The Archbasilica of St John Lateran is the cathedral of Rome, that is, the Pope's own church as Bishop of Rome. Although St Peter's Basilica in the Vatican is larger, more famous and more visited, it is the Lateran — not St Peter's — that holds first rank in the hierarchy of Catholic sanctuaries. It bears a title no other building claims: "mother and head of all the churches of the City and of the world".
Raised in the 4th century by the Emperor Constantine in the wake of the freedom restored to the Church, it was the first great Christian basilica in the West[1]: no longer a clandestine house of prayer, but a public, sumptuous monument willed by the imperial power itself. Consecrated according to tradition on 9 November 324 by Pope Sylvester I, it was first dedicated to the Most Holy Saviour, before receiving over the centuries the double patronage of St John the Baptist and St John the Evangelist which gave it its usual name.
For a thousand years, from the 4th to the 14th century, the Lateran was the heart of Church government: the popes resided there in the neighbouring Lateran Palace, held their councils there — five ecumenical councils bear the name Lateran — and were enthroned there. Only on the return from the Avignon exile, in the 14th century, did the pontifical residence shift definitively to the Vatican, the Lateran then lying in ruins after two devastating fires.
Rebuilt and transfigured in the Baroque age by Francesco Borromini (1646-1649), given a monumental facade by Alessandro Galilei (1735), the basilica preserves beneath its modern splendours the memory of the most venerable of Christendom's churches. Its feast of the Dedication, on 9 November, celebrated by the whole Latin Church, honours not merely a building of stone: it recalls that every temple built by human hands is the image of the Church herself, a "spiritual house" made of "living stones".
Why is the Lateran "the mother of all churches"?
An inscription on the facade wall
On the facade wall of the basilica, between the main portals, a plaque bears the Latin inscription that sums everything up: St John Lateran is "the mother and head of all the churches of the City and of the world".[2]
"The most holy church of the Lateran, mother and head of all the churches of the City and of the world." — Plaque on the facade wall of St John Lateran[3]
The great inscription running along the frieze of the facade is of another nature: it is the dedication of Clement XII, under whom the facade was completed — "Clemens XII Pont Max Anno V Christo Salvatori In Hon SS Ioan Bapt et Evang", that is: the Sovereign Pontiff Clement XII, in the fifth year of his pontificate (1735), [dedicates this building] to Christ the Saviour, in honour of St John the Baptist and St John the Evangelist.[4]
The formula is not decorative hyperbole. It expresses a primacy of dignity: because the Pope is the Bishop of Rome, his cathedral is, by dignity, the first of all.[5]
The Pope's cathedral — not St Peter's
This is the point most visitors miss. A diocese's cathedral is the church housing the cathedra — the seat — of the bishop. And the Bishop of Rome is the Pope. His cathedra stands not in the Vatican but at the Lateran, in the apse of St John's.[6] St Peter's is the basilica of the apostle's tomb and the venue of the great pontifical ceremonies; the Lateran is the cathedral properly speaking, the episcopal see of Rome.
This primacy of rank is expressed in the very name of the high altar — the so-called "papal" altar — the proper altar of the cathedral of the Bishop of Rome.[7] Each year, on the feast of the Dedication, the attention of the universal Church turns to this sanctuary as to the hearth of its communion.
A primacy of dignity, not of beauty or size
The Lateran is neither the largest of Rome's basilicas nor the most richly adorned. Its greatness is historical and symbolic: it was the first, it is the cathedral of Peter's successor, it saw the birth of five ecumenical councils. The liturgy itself calls it "first in date and in dignity of all the churches of the West".[8] To understand the Lateran is to understand that in the Church dignity is not measured by the size of stones, but by the place a site occupies in the history of salvation.
The Constantinian foundation in the 4th century
The Laterani estate and the Domus Faustae
The name "Lateran" comes from a great Roman family, the Laterani, who owned a vast estate on the Caelian Hill. One of them, Plautius Lateranus, consul designate, saw his property confiscated under Nero for his part in a conspiracy.[9] The estate then passed into the imperial patrimony, and ended up belonging to Fausta, Constantine's wife — hence the palace's other name, the Domus Faustae, the "house of Fausta".[10]
It was in this residence that, as early as 313, a Roman council met against the Donatists: proof that the place was already, at the very beginning of Constantine's Christian reign, a centre of Roman Church life.[11]
Constantine's donation and the first basilica of the West
In the wake of his victory at the Milvian Bridge (312) and the Edict of Milan (313) which freed Christian worship, Constantine gave the Church of Rome the Lateran estate to build a church worthy of the now-recognised faith.[12] Work began as early as 312-313, partly on the site of a barracks of the imperial horse guard, the Equites singulares, disbanded because it had fought for Constantine's defeated rival, Maxentius.[13]
The Constantinian building was immense for its time: a five-aisled basilica, about a hundred metres long, able to welcome thousands of the faithful.[14] For the first time, Christianity was stepping out of private houses and cemeteries to display itself in a public monument of marble and gold. Constantine's gesture was not merely architectural: it inaugurated a new era, that of a Church free to build in the open. This turning point is developed in the article on Constantine and the freedom of the Church.
Consecration by Pope Sylvester, 9 November 324
Tradition fixes 9 November 324 as the date of the basilica's consecration by Pope Sylvester I (314-335) — Benedict XVI, in 2008, spoke cautiously of a dedication celebrated by Sylvester "around 324".[15] The church was dedicated to the Most Holy Saviour — Basilica Salvatoris — and it was under this title that it was first known.[16] This date remained so important that it became the liturgical feast of the Dedication, celebrated every 9 November by the whole Latin Church.
Beside the basilica, Constantine had an octagonal baptistery raised, carried on eight columns of porphyry, which remains the oldest in Rome and served as the model for countless Christian baptisteries.[17] A stubborn legend held that Constantine himself had been baptised there by Sylvester; in reality the emperor received baptism at the end of his life, near Nicomedia, at the hands of Eusebius.[18]
From the "Holy Saviour" to the two St Johns
The church only gradually took the name by which we know it today. Established with certainty: the addition of the two Johns is later than the 6th century (Benedict XVI, Angelus of 9 November 2008). A common chronology attaches the patronage of St John the Baptist to the 10th century, under Sergius III — in connection with the neighbouring baptistery dedicated to him —, then that of St John the Evangelist to the 12th century, under Lucius II; but these precise pontifical attributions remain a hypothesis, which no identified act confirms — the Catholic Encyclopedia (1913) for its part ascribes the Johannine dedication to the neighbouring Benedictine monastery, without naming any pope.[19] Hence the full name, which tells the whole sedimentation of history: "archbasilica of the Most Holy Saviour and of St John the Baptist and St John the Evangelist at the Lateran".[20]
A thousand years of pontifical residence
The Lateran Palace, the first "Vatican"
Adjoining the basilica, the Lateran Palace was, from the 4th century to the 14th, the official residence of the popes and the seat of Church government.[21] It was there, and not in the Vatican, that the great decisions were taken, embassies received, synods assembled. Under Innocent III (1198-1216), at the height of the pontifical Middle Ages, the palace knew its greatest splendour.[22]
The Lateran complex was thus, for a millennium, what the Vatican later became: the nerve centre of Catholicism. This continuity explains why the Lateran remains to this day, in law, the cathedral of Rome, even though the Pope now lives in the Vatican.
The baptistery, the Sancta Sanctorum and the Scala Santa
The Lateran is not reducible to the basilica: it forms a group of sanctuaries of exceptional spiritual density. Beside the Constantinian baptistery stands the chapel of the Sancta Sanctorum — the "Holy of Holies" — the popes' former private chapel, housing an image of Christ held to be acheiropoieton, that is, "not made by human hand".[23][24]
It is reached by the famous Scala Santa, the "Holy Staircase", venerated as the stairway Jesus is said to have climbed in Pilate's praetorium, and which tradition says was brought from Jerusalem by St Helena, Constantine's mother.[25] Pilgrims still climb it on their knees today. This abundance of relics and devotions made the Lateran, long before St Peter's took over, Rome's foremost pilgrimage goal.
The five councils of the Lateran
Five ecumenical councils met in the basilica or the palace, to the point that the word "Lateran" today designates almost as much a series of councils as a building. Each marked the history of Catholic discipline and dogma.
- 1123Lateran ICallixtus II
The first ecumenical council held in the West. It ratified the Concordat of Worms (1122) and closed the Investiture Controversy — the long conflict between popes and emperors over who appoints bishops and abbots —, fixing relations between spiritual and temporal power.[26]
- 1139Lateran IIInnocent II
- 1179Lateran IIIAlexander III
It fixed the rules of papal election by requiring a two-thirds majority of the college of cardinals, a rule still in force.[28]
- 1215Lateran IVInnocent III
The most important of the medieval councils: it defined the term transubstantiation — the consecrated bread and wine truly become the Body and Blood of Christ —, imposed annual confession and communion, and proclaimed faith in God the creator of all things visible and invisible.[29]
- 1512-1517Lateran VJulius II and Leo X
For details of each, see the articles devoted to the first, the second, the third, the fourth and the fifth Lateran council.
Destructions, exile and rebirths
The barbarian sacks and the earthquake of 896
The Lateran's long life was a succession of trials and recoveries. The basilica suffered from the sacks of Rome by Alaric's Visigoths (410) then by Genseric's Vandals (455), which stripped it of its treasures.[31] Worse still, a violent earthquake in 896 almost entirely ruined the Constantinian building, which had to be largely rebuilt.[32]
The two fires of 1308 and 1361
The hardest blow came from fire. In 1308, a first fire ravaged the basilica; a second, in 1361 in the most common chronology, completed its devastation.[33] The popes, who financed the reconstructions from Avignon, could never restore its former splendour. Part of the structures later covered by the Baroque decor dates from this age of ruins and laborious rebuilding.
The Avignon exile and the shift to the Vatican
The Lateran's fate turned with the popes' departure for France. From 1309, during the Avignon papacy, the pontifical residence was transferred out of Rome; the Lateran palace and basilica, deprived of their hosts and struck by fires, fell into decay.[34] When the papacy returned to Rome, it settled in the Vatican, near Peter's tomb, in a palace in better condition.
The Lateran was never abandoned in law — it remained the cathedral of Rome —, but it ceased to be the popes' residence. This move explains the present paradox: the Pope's cathedral is not where the Pope lives.
The first reconstructions
Several popes laboured to raise the battered basilica: Sergius III in the 10th century, Martin V in the early 15th century after the return from Avignon, had walls and pavements restored.[35] But it took the Baroque age, and a comprehensive project, to give the Lateran back a majesty worthy of its rank.
The Baroque metamorphosis
Borromini and the jubilee of 1650
In view of the jubilee of 1650, Pope Innocent X entrusted Francesco Borromini, one of the geniuses of Roman Baroque, with the complete renovation of the nave.[36] The architect faced a challenge: to modernise a medieval vessel threatening ruin without destroying the ancient coffered ceiling. His solution was masterly. He encased the old columns in twelve great piers articulated with pilasters, creating a powerful, unified nave, and left large niches in these piers to receive statues.[37]
Borromini scrupulously respected the most venerable elements: he kept the 16th-century ceiling and was instructed not to touch the apse mosaic.[38] The result is one of Rome's finest Baroque interiors, where the rigour of a geometric mind joins respect for a thousand-year heritage.
The colossal statues of the apostles
The niches hollowed out by Borromini received, between 1704 and 1718, twelve colossal statues of the apostles, carved by the leading artists of Roman Baroque after drawings by Carlo Maratta.[39] Larger than life, draped in broad theatrical gestures, they line the nave like a guard of honour leading the faithful to the papal altar. Each apostle holds the attribute of his martyrdom or mission, forming a catechesis in stone on the apostolic foundations of the Church.
The facade by Alessandro Galilei (1735)
The present facade, dominating the square, is the work of the Florentine architect Alessandro Galilei, completed in 1735 under Pope Clement XII.[40] In travertine, it deploys a colossal order of pilasters and columns, crowned by an attic bearing fifteen monumental statues: at the centre Christ the Saviour, flanked by St John the Baptist and St John the Evangelist, and on either side the Doctors of the Church.[41] The sculpted programme restates the basilica's triple patronage and proclaims, from atop the facade, the teaching office of the Roman Church.
The apse mosaic: from Torriti to Leo XIII
The Lateran's most precious decoration is the apse mosaic. Pope Nicholas IV had it executed in 1291 by the mosaicist Jacopo Torriti, around an ancient motif — Christ in bust appearing in the sky, a jewelled cross from which flow the rivers of paradise, the dove of the Spirit.[42] In 1878, Pope Leo XIII had the ancient apse demolished to enlarge the choir — which became the setting for ordinations and the other pontifical functions of Rome's cathedral —; the original mosaics were preserved with the greatest care and remounted at the back of the new, deeper apse.[43] The composition, heir to Rome's oldest apses, remains one of the summits of medieval Christian art.
The treasures of the archbasilica
The Gothic ciborium and the heads of Peter and Paul
Above the papal altar rises a great Gothic ciborium of the 14th century, an openwork stone canopy housing, in its upper part, the Lateran's most famous treasure: the relics venerated as the heads of St Peter and St Paul.[44] These relics, placed in this reliquary under Pope Urban V, in 1370, make the basilica a foremost place of devotion to the two apostles who founded the Church of Rome.[45]
The wooden papal altar
The papal altar conceals another signal relic. Tradition holds that it encloses a wooden table on which St Peter himself is said to have celebrated the Eucharist during his stay in Rome; this relic is said to have been preserved through the persecutions, then brought to the Lateran by Constantine and Sylvester from the church of St Pudentiana.[46] Whether or not one takes the tradition literally, it expresses the deep conviction animating this place: the unbroken chain linking today's Pope to the first of the apostles.
The Vassalletto cloister
On the flank of the basilica opens a cloister of rare elegance, raised in the first third of the 13th century (usual dating: c. 1222-1232) by the Vassalletto, a dynasty of Roman marble-workers.[47] Its galleries rest on twin colonnettes, some straight, others twisted, inlaid with mosaics of gold and coloured glass — the so-called Cosmatesque style, proper to Roman Romanesque art. A square of thirty-six metres a side according to the guides, it is the largest cloister in Rome, and one of the finest medieval ensembles preserved in the city.[48]
The Egyptian obelisk
At the centre of the square, before the facade, stands the Lateran obelisk, the tallest standing Egyptian obelisk in the world: cut from the red granite of Aswan for Pharaoh Thutmose III, it rises 32.18 metres, and 45.70 metres with its base and the crowning cross, for a weight of about 455 tonnes.[49] Found broken in three pieces, restored by the architect Domenico Fontana, it was re-erected by order of Pope Sixtus V in 1588 — a year before the Flaminio of the Piazza del Popolo (1589), which is, for its part, the last of the ancient obelisks re-erected in Rome under Sixtus V —, surmounted by the cross consecrating the ancient pagan monument to Christ's triumph.[50]
What does the feast of the Dedication, 9 November, celebrate?
A feast of the universal Church
On 9 November, the traditional anniversary of the consecration — dated 324 —, the Latin Church celebrates the Dedication of the Lateran Basilica not as a local Roman feast, but as a feast of the whole Church.[51][52] The exceptional rank of this memorial — which takes precedence even over an ordinary Sunday when it falls on that day — is explained by the meaning it carries: to honour the Pope's cathedral is to manifest the communion of all the faithful with the See of Peter, the "principle and visible foundation" of the Church's unity.[53]
Stone and people: a building that speaks of the Church
The liturgy of the Dedication does not stop at stones. It sees in every consecrated building the sign of the living Church, that spiritual temple God builds with souls. The preface of the Mass says it in a limpid formula:
"You wish to dwell in a house of prayer, so that your grace, ever offered, may make us the temple of the Holy Spirit." — Preface of the Dedication of a church[54]
The image comes directly from St Peter's first letter, which calls Christians to become the very materials of the true sanctuary:
"Come to the Lord Jesus: he is the living stone... You too, as living stones, enter into the building of the spiritual dwelling." — First Letter of St Peter 2:4-5
Why this feast concerns us
To celebrate the Lateran's dedication is therefore to recall a twofold truth. On the one hand, the Church is not a purely inward or invisible reality: it has a visible centre, a cathedral, a bishop who is the Pope, a history written in stone since Constantine. On the other, this marble sanctuary is itself only an image: the true "house of God" is the people of the baptised, called to form together "the eternal dwelling of his glory".[55] Christendom's oldest basilica thus sends each of the faithful back to his own vocation: to be himself a living stone of the Temple God builds through the centuries.
To go further
- Constantine and the freedom of the Church — the context of the foundation: the emperor who made Christian worship free and built the first basilicas.
- The Edict of Milan (313) — the decision that opened the era of great Christian buildings.
- The construction of the old St Peter's Basilica — the other great Constantinian basilica, over the tomb of the apostle Peter.
- The Avignon papacy — the exile that sealed the Lateran's decline as pontifical residence.
- The Fourth Lateran Council (1215) — the most important of the five councils held at the Lateran.
Notes and References
liturgie.catholique.fr, "Feast of the Dedication of the Lateran Basilica, 9 November" (Conference of French Bishops — National Service for Liturgical Pastoral Care, https://liturgie.catholique.fr/fete-de-la-dedicace-de-la-basilique-du-latran/, page checked in session): the basilica "first in date and in dignity of all the churches of the West"; the Pope's ministry the "principle and visible foundation" of unity (extract from the Roman Missal); "living stones", "the eternal dwelling of his glory" (opening prayer) and "you wish to dwell in a house of prayer… the temple of the Holy Spirit" (preface of the Dedication); universal scope of the feast.
1 6 8 51 53 54 55Plaque affixed to the facade wall of the archbasilica, between the main portals: "Sacrosancta Lateranensis ecclesia omnium urbis et orbis ecclesiarum mater et caput" ("The most holy church of the Lateran, mother and head of all the churches of the City and of the world") — formula cited by Benedict XVI, Angelus of 9 November 2008 (vatican.va), and attested on the very walls by the Catholic Encyclopedia (1913). Not to be confused with the great inscription on the pediment frieze, which is Clement XII's dedication (see note [^facade-galilei]).
2 3Competition of 1731 under Clement XII (runner-up: Luigi Vanvitelli), won by the Florentine Alessandro Galilei; travertine facade built in 1732-1735, colossal order of pilasters and columns surmounted by fifteen statues (Christ the Saviour at the centre, the two St Johns, the Doctors of the Church) — a programme restating the triple patronage. Sources: RIBApix catalogue of the Royal Institute of British Architects, ref. RIBA84309 ("San Giovanni in Laterano, Rome: elevation of the entrance facade": "The entrance front was designed by Alessandro Galilei and completed in 1735"; nave rebuilt by Borromini in 1646-1649) and the facade's own dedicatory inscription — "Clemens XII Pont Max Anno V Christo Salvatori In Hon SS Ioan Bapt et Evang" — Clement XII's year V (elected July 1730) fixing completion in 1735.
4 40 41Catholic Encyclopedia (1913), "Saint John Lateran" (text checked on Wikisource): Plautius Lateranus confiscated under Nero, palace passed to Constantine through Fausta (Domus Faustae), donation to the Church in the time of Miltiades (the CE writes "not later than about 311" — an old conjecture; Constantine only taking Rome in October 312, the donation necessarily falls between late 312 and 313, in time for the council against the Donatists of 313), popes' residence and cathedral of Rome, title "Omnium urbis et orbis ecclesiarum mater et caput" readable on its walls; primitive dedication Basilica Salvatoris; the author reckons it an adaptation of a great palace hall rather than a newly built basilica (citing St Jerome, Ep. lxxiii).
5 9 10 11 16 20 21The Catholic Encyclopedia (1913), which at length describes the Lateran high altar (encased wooden altar, 1369 Gothic baldacchino, heads of the apostles), reserves its celebration to the pope alone in no passage: the claim of an exclusive pontifical reservation, sometimes reported in the 20th century, having been found in no text of the liturgical law in force, is not taken up here; only the customary name of "papal altar" is kept, which tells this altar's link to the Pope's cathedral.
7Benedict XVI, Angelus of 9 November 2008, St Peter's Square (vatican.va): Constantine gives Pope Miltiades the old Laterani estate and has the basilica, the baptistery and the patriarchate built there, the popes' residence until the Avignon period; "the dedication of the basilica was celebrated by Pope Sylvester around 324" and the church was dedicated to the Most Holy Saviour; the titles of St John the Baptist and St John the Evangelist were only added "after the 6th century"; the feast, at first proper to Rome, was extended in 1565 to all Churches of the Roman rite.
12 15 52Liber Pontificalis, Life of Sylvester I (ch. XXXIV), ed. L. Duchesne, vol. I: Constantinian foundation ("basilicam Constantinianam") and list of donations, including the silver fastigium to the Saviour; R. Krautheimer, Corpus Basilicarum Christianarum Romae, vol. V, Vatican City, 1977, monograph "S. Giovanni in Laterano", pp. 1-92 (the reference archaeological survey); A. Claridge, Rome: An Oxford Archaeological Guide, Oxford University Press, 1998, Lateran section (pp. 319-324) (terrain, barracks and Constantinian basilica). Dating of the works: R. Krautheimer, "The Constantinian Basilica", Dumbarton Oaks Papers 21 (1967) — begun in 312/313, completed before 320. The location on the barracks of the Equites singulares, Maxentius's troop disbanded after 312, belongs to modern archaeology, not to the Liber Pontificalis.
13R. Krautheimer, Corpus Basilicarum Christianarum Romae, vol. V, Vatican City, 1977, monograph "S. Giovanni in Laterano", pp. 1-92: five-aisled plan of the Constantinian basilica; usual guidebook dimensions (about 100 m long). The Catholic Encyclopedia (1913) still admitted "we have no reliable information" on the dimensions of the primitive church.
14Catholic Encyclopedia (1913), "Saint John Lateran": the detached baptistery, octagonal, with eight porphyry columns, a foundation attributed to Constantine (a tradition judged well-founded), restorations by Sixtus III (inscription on the architrave) and Hilary (461-468); on the other hand "no foundation" for a baptism of Constantine by Sylvester in this place: the emperor was baptised at the end of his life by Eusebius, in the diocese of Nicomedia (citing Funk, Manual of Church History, 1910, and Duchesne, Liber Pontificalis, I).
17 18The precise pontifical attributions (Sergius III in the 10th century for St John the Baptist, Lucius II in the 12th for St John the Evangelist) are those of the common encyclopaedic chronology, with no identified pontifical act: the English Wikipedia gives them with no citation at all (and even places Lucius II in the 13th century, whereas he reigned in 1144-1145); the Catholic Encyclopedia (1913) ascribes the dedication to St John to the neighbouring Benedictine monastery, without naming any pope. Established on the other hand: the primitive title of the Saviour and the later addition of the two Johns — "after the 6th century" according to Benedict XVI, Angelus of 9 November 2008 (vatican.va).
19Catholic Encyclopedia (1913), "Saint John Lateran": treasures plundered by the Vandals, restoration by Leo the Great around 460 then by Hadrian I, earthquake of 896, rebuilding on the same dimensions, Clement V and John XXII, new fire in 1360, Urban V; palace the popes' residence "about a thousand years", Sergius III restorer in the 10th century after a fire, embellishments by Innocent III, departure for Avignon, great works by Martin V (including the pavement with columns, arms of the Colonna); the palace suffered two fires, in 1307 and 1361.
22 31 34 35Catholic Encyclopedia (1913), "Saint John Lateran": the heads of the apostles Peter and Paul were kept in the Sancta Sanctorum, the private chapel of the Lateran palace, until the preparation of the high-altar reliquary destined to receive them.
23Official portal of Rome's cultural heritage (Roma Capitale, 060608.it), "Santuario della Scala Santa e Cappella del Sancta Sanctorum": the oldest and most venerated object of the Sancta Sanctorum is the image of the Holy Saviour called "Acheropita" ("not made by human hand"), painted on wood — the enthroned Saviour, blessing with his right hand and holding the Book in his left; legend holds that St Luke began it and an angel finished it.
24Encyclopaedia Britannica, "Scala Santa": the palace's grand staircase, identified by popular piety, from the 8th-9th centuries, as the staircase brought from Jerusalem by St Helena, Constantine's mother, from Pilate's praetorium; Catholic tradition venerates in it the steps climbed by Christ during his Passion.
25Catholic Encyclopedia (1913), "Lateran Councils": Lateran I, convened in December 1122 immediately after the Concordat of Worms — the agreement between Pope Callixtus II and Emperor Henry V closing the Investiture Controversy.
26Catholic Encyclopedia (1913), "Lateran Councils": Lateran II (1139), under Innocent II — disciplinary canons imposing ecclesiastical celibacy, received as nullifying marriages contracted by major clerics.
27Catholic Encyclopedia (1913), "Lateran Councils": Lateran III (1179), under Alexander III — the pope's election is reserved to the cardinals, by a two-thirds majority.
28Catholic Encyclopedia (1913), "Lateran Councils": Lateran IV (1215), under Innocent III — canon 1 Firmiter gives the first official use of the word "transubstantiation" for the Eucharist, and canon 21 Omnis utriusque sexus imposes on every faithful confession and communion at least once a year.
29Catholic Encyclopedia (1913), "Lateran Councils": Lateran V (1512-1517) — the bull Apostolici regiminis (8th session, 19 December 1513) defines the immortality of the individual soul against the Averroising theses then defended around Pietro Pomponazzi (cf. Stanford Encyclopedia of Philosophy, "Pietro Pomponazzi").
30Catholic Encyclopedia (1913), "Saint John Lateran": in 896, the building was almost entirely destroyed by an earthquake — "ab altari usque ad portas cecidit" ("it collapsed from the altar to the doors") — then rebuilt keeping essentially the old lines.
32First fire in 1308 (the Catholic Encyclopedia (1913) gives 1307 for the palace fire); second fire dated 1361 in the most common chronology, but 1360 for the basilica according to the Catholic Encyclopedia (1913) and 1362 according to the English Wikipedia: the exact year varies with the authors. In any case, the popes financed the reconstructions from Avignon, without restoring the Lateran to its former splendour.
33Catholic Encyclopedia (1913), "Saint John Lateran": restoration under Innocent X with Borromini as architect — antique columns encased in huge piers; usual art-history chronology: works 1646-1649 in view of the jubilee of 1650, twelve piers with niches, preservation of the ceiling and the apse mosaic. The preserved ceiling is of the 16th century (and not of the 14th): gilded wooden coffered ceiling commissioned in 1562 by Pius IV, designed by Daniele da Volterra and Pirro Ligorio, executed by the cabinet-maker Flaminio Boulanger (1562-1567) — which Borromini would have liked to replace and had to keep. Sources: official portal of Rome's cultural heritage (Roma Capitale, 060608.it, "Basilica di San Giovanni in Laterano": 16th-century ceiling, "perhaps designed by Pirro Ligorio", which Borromini wanted to remove) and Bridgeman Images, Jemolo photo ("The ceiling is probably realized by Pirro Ligorio (1510-1583), 1562-1567").
36 37 38Commission announced in 1702 by Clement XI and Cardinal Benedetto Pamphili, archpriests of the archbasilica: twelve colossal sculptures of the apostles (St Paul taking Judas's place, and not St Matthias) for Borromini's niches, left empty for decades. Execution 1704-1718 after drawings by Carlo Maratta, the pope's favourite painter — with the exception of Pierre Le Gros the Younger, who refused the imposed drawing —, dating statue by statue established from archives (first begun 1704, last completed 1715-1718). Named archival source: Michael Conforti, "The Lateran Apostles", unpublished doctoral thesis (Harvard University, 1977), summarised in "Planning the Lateran Apostles", in H. A. Millon (ed.), Studies in Italian Art and Architecture 15th through 18th Centuries, Rome, 1980 (Memoirs of the American Academy in Rome, 35), pp. 243-260 — taken up by the reference encyclopaedic synthesis (1702 announcement, list of sculptors — Monnot, Moratti, Ottoni, Mazzuoli, Le Gros, de' Rossi, Rusconi — and dating statue by statue).
39Encyclopaedia Britannica, "San Giovanni in Laterano" / "Basilica of St. John Lateran": apse mosaic executed in 1291 by Jacopo Torriti at the initiative of Pope Nicholas IV, status as cathedral of Rome and oldest of the major basilicas.
42Catholic Encyclopedia (1913), "Saint John Lateran": the ancient apse, with its mosaics, survived until 1878, date of its destruction to enlarge the choir; the original mosaics were preserved with the greatest care and remounted at the back of the new apse — Christ surrounded by nine angels (5th, even 4th century), jewelled cross with the dove, rivers of paradise, 6th-century saints retouched in the 13th, Torriti's and Camerino's signatures still legible.
43Catholic Encyclopedia (1913), "Saint John Lateran": above the high altar, Gothic baldacchino on four marble columns, decorated with paintings by Barna da Siena, dated 1369; in its upper part are kept the heads of the apostles Peter and Paul, the basilica's treasure, previously guarded in the Sancta Sanctorum.
44The placing of the heads in the ciborium is attributed to the pontificate of Urban V, in 1370: D. Mondini, "Furtum Sacrilegum: The Holy Heads of Peter and Paul and Their Reliquaries in the Lateran", ch. 17 (pp. 345-378) in L. E. Bosman, I. P. Haynes, P. Liverani (eds.), The Basilica of Saint John Lateran to 1600, Cambridge University Press, 2020, with the Constitutiones Lateranensis Ecclesiae promulgated under Urban V in 1370 on the guarding of the heads (cited after Cancellieri, Memorie). The exact day of the transfer (2 March according to the common chronology) has not been confirmed by a primary source: only the year 1370 is retained here.
45Catholic Encyclopedia (1913), "Saint John Lateran": the high altar, alone among all the altars of the Catholic world in being of wood and not of stone, is the table on which St Peter is said to have celebrated during his stay in Rome — preserved through the persecutions then brought by Constantine and Sylvester from St Pudentiana (a fragment was left there), today encased in a stone altar clad with marble, the wood remaining visible.
46Catholic Encyclopedia (1913), "Saint John Lateran": the cloister, sole vestige of the monastery, with inlaid marble columns, "of a style intermediate between the Romanesque proper and the Gothic", work of Vassellectus and the Cosmati, dated to the early 13th century; P. C. Claussen – D. Senekovic, S. Giovanni in Laterano, Corpus Cosmatorum, vol. 2, 2, Franz Steiner Verlag, Stuttgart, 2008 (reference monograph: usual dating c. 1222-1232, with variants 1215-1232 or 1222-1230 according to authors; square of about 36 m a side according to the guides).
47 48Obelisk of Thutmose III in red Aswan granite, tallest standing Egyptian obelisk: 32.18 m (45.70 m with base and cross), about 455 tonnes — concordant measurements of the usual surveys; epigraphic and historical reference: E. Iversen, Obelisks in Exile, vol. I (The Obelisks of Rome), G.E.C. Gad, Copenhagen, 1968, pp. 55-64 (Lateran obelisk).
49Found broken in three pieces, restored by Domenico Fontana and re-erected by order of Sixtus V in 1588 on the Lateran square (the year 1588 is concordant; the exact day sometimes advanced has not been confirmed by a primary source and is not retained here). The Flaminio of the Piazza del Popolo was only raised in 1589 — by the same Fontana, by order of the same Sixtus V —: it is the latter, and not the Lateran, that is the last of the ancient obelisks re-erected in Rome under Sixtus V (Pleiades, "Flaminio Obelisk": erected in the Piazza del Popolo in 1589; Piranesi exhibition of Wellesley College).
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