The ancient Chapel of Saint Andrew with the Oratories of Saint Barbara and Saint Silvia is located close to the Church of San Gregorio Magno al Celio. The monumental complex with the archaeological areas attached to it was donated to the Chapter of Saint Mary Major by Pope Leo XII in 1828. The Triclinium is the oldest Oratory and is dedicated to Saint Barbara. Its back wall houses a sculpture by Nicolas Cordier, Papa Gregorio Magno benedicente, (Pope Gregory the Great blessing), which was made from a marble sculpture that Michelangelo Buonarroti had left unfinished. The marble table on which Saint Gregory and his mother Saint Silvia provided lunch every day for 12 poor people is located in the middle.
The Chapel of Saint Andrew was erected on architectural remains that mark the first place of worship established by Saint Gregory the Great. The side walls have two large frescoes by Guido Reni and Domenichino, both depicting the Saint in various moments.
From behind the Church, overlooking the Clivus Scauri, one can admire the archaeological remains of what the most esteemed scholars and experts in the sector recognise as the apsed hall of basilican plan of the Library of Pope Agapito I (535-536).
