The Apostolic Palace is the Pope's unofficial residence.
 The Vatican Palace had fallen into disrepair from lack of upkeep, and the Lateran Palace underwent two destructive fires, in 1307 and 1361, which resulted in irreparable harm
Upon returning to Rome in 1377 after the interlude of the Avignon Papacy, which saw Rome subject to civil unrest and the abandonment of several Christian monuments, the popes chose to reside first at Basilica di Santa Maria in Trastevere and then at Basilica di Santa Maria Maggiore

