Archbasilica of St. John Lateran - Architectural History

Architectural History

An apse lined with mosaics and open to the air still preserves the memory of one of the most famous halls of the ancient palace, the "Triclinium" of Pope Leo III, which was the state banqueting hall. The existing structure is not ancient, but some portions of the original mosaics may have been preserved in the three-part mosaic of its niche. In the centre Christ gives their mission to the Apostles, on the left he gives the keys to St. Sylvester and the Labarum to Constantine, while on the right St. Peter gives the papal stole to Leo III and the standard to Charlemagne.

Some few remains of the original buildings may still be traced in the city walls outside the Gate of St. John, and a large wall decorated with paintings was uncovered in the 18th century within the basilica itself, behind the Lancellotti Chapel. A few traces of older buildings also came to light during the excavations made in 1880, when the work of extending the apse was in progress, but nothing was published of real value or importance.

A great many donations from the popes and other benefactors to the basilica are recorded in the Liber Pontificalis, and its splendour at an early period was such that it became known as the "Basilica Aurea", or Golden Basilica. This splendour drew upon it the attack of the Vandals, who stripped it of all its treasures. Pope Leo I restored it around 460, and it was again restored by Pope Hadrian.

In 897 it was almost totally destroyed by an earthquake—ab altari usque ad portas cecidit ("it collapsed from the altar to the doors"). the damage was so extensive that it was difficult to trace the lines of the old building, but these were in the main respected and the new building was of the same dimensions as the old. This second church lasted for four hundred years, and then burned in 1308. It was rebuilt by Pope Clement V and Pope John XXII. It was burned down once more in 1360, and was rebuilt by Pope Urban V.

Through vicissitudes the basilica retained its ancient form, being divided by rows of columns into aisles, and having in front a peristyle surrounded by colonnades with a fountain in the middle, the conventional Late Antique format that was also followed by the old St Peter's. The façade had three windows, and was embellished with a mosaic representing Christ, the Saviour of the World.

The porticoes were frescoed, probably not earlier than the 12th century, commemorating the Roman fleet under Vespasian, the taking of Jerusalem, the Baptism of the Emperor Constantine and his "Donation" of the Papal States to the Church. Inside the basilica the columns no doubt ran, as in all other basilicas of the same date, the whole length of the church from east to west.

In one of the rebuildings, probably that which was carried out by Clement V, the feature of a transverse nave was introduced, imitated no doubt from the one which had been added, long before this, at Basilica of Saint Paul Outside the Walls. Probably at this time the church was enlarged.

Some portions of the older buildings survive. Among them the pavement of medieval Cosmatesque work, and the statues of St. Peter and Saint Paul, now in the cloisters. The graceful baldacchino over the high altar, which looks out of place in its present surroundings, dates from 1369. The stercoraria, or throne of red marble on which the popes sat, is now in the Vatican Museums. It owes its unsavoury name to the anthem sung at the papal enthronement, "De stercore erigens pauperem" ("lifting up the poor out of the dunghill", from Psalm 112).

From the 5th century there were seven oratories surrounding the basilica. These before long were incorporated in the church. The devotion of visiting these oratories, which held its ground all through the medieval period, gave rise to the similar devotion of the seven altars, still common in many churches of Rome and elsewhere.

Of the façade by Alessandro Galilei (1735), the cliché assessment has ever been that it is the façade of a palace, not of a church. Galilei's front, which is a screen across the older front creating a narthex or vestibule, does express the nave and double aisles of the basilica, which required a central bay wider than the rest of the sequence; Galilei provided it, without abandoning the range of identical arch-headed openings, by extending the central window by flanking columns that support the arch, in the familiar Serlian motif.

By bringing the central bay forward very slightly, and capping it with a pediment that breaks into the roof balustrade, Galilei provides an entrance doorway on a more-than-colossal scale, framed in the paired colossal Corinthian pilasters that tie together the façade in the manner introduced at Michelangelo's palace on the Campidoglio.