Abbey of San Pietro al Monte is an ancient monastic complex of Romanesque style in the town of Civate. The site, presently not occupied by religious, consists of three buildings: the Basilica of San Pietro, the oratory dedicated to St. Benedict, and what was the monastery of which only ruin remain.
According a legend the abbey was founded in 772 AD by Desiderius, the last king of Lombardy. The oldest document dates from the 9th century. The monastery was destroyed in a war between city state of Milan and Frederick Barbarossa, the Holy Roman Emperor. The monks returned, but were expelled in 1798.
The buildings were part of the Benedictine abbey complex of Civate, the Basilica of San Calocero and the churches of San Nazario and San Vito. Two stone portals include engravings above them. The frescoes in the basilica of St. Peter, whose theme is the final apotheosis of Christ and the Triumph of the Righteous along the lines of the Apocalypse of St. John, makes it one of the most important Lombard Romanesque testimonies.
The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.