Wilpert, Le Pitture delle catacombe romane (Rome, 1903), in which all the important frescoes are reproduced in colours, is to be regarded as an addition to the Roma sotterranea.
A basilica, with four towers, in the later Romanesque style, dating from the 12th and 13th centuries and restored in 1848, containing old mural frescoes and carved figures.
It is unnecessary to enter on any detailed description of the frescoes which cover the walls and ceilings of the burial-chapels in the richest abundance.
There are many fine frescoes in the interior ranging from c. 1300 (knights kneeling before the Virgin) to the 15th century, including Pisanello's beautiful painting of St George (mentioned below).
It is probable, however, that before this time some of the pupils of Squarcione, including Mantegna, had already begun that series of frescoes in the chapel of S.
Very few of the frescoes have been identified, but two are illustrations of stories in Arya Sura's Jataka Maid, as appears from verses in Buddhist Sanskrit painted beneath them.
The frescoes on the cupola representing the vision of S.
Giotto and others, the most famous of which are those over the high altar by Giotto, illustrating the vows of the Franciscan order; while the upper church has frescoes representing scenes from the life of St Francis (probably by Giotto and his contemporaries) on the lower portion of the walls of the nave, and scenes from Old and New Testament history by pupils of Cimabue on the upper.
The Gothic church of San Niccolo (1310-1352) contains a fine tomb by Tullio Lombardo, and a large altarpiece by Fra Marco Pensabene and others; in the church and adjoining chapter-house are frescoes by Tommaso da Modena (1352), some frescoes by whom (life of S.
Satiro are even earlier mosaics (5th century); there are also fine frescoes by Borgognone and Bernardino Lanini.