Documents allege a church existed at the site by 756 . Of that building , only the baptismal font seems to have survived . The earthquake of 1117 prompted a major reconstuction , and a new building consecrated in 1122 . The '' Portal of Paradise '' retains some of the Romanesque sculptural elements , with a relief depicting Madonna and Child with St Peter and Angels . The portico on the left of the church with octagonal columns , church cloister , and bell-tower , date to the 15th century . The church facade was also completed in the 15th-century . The '' Palazzo Pretorio '' adjacent to the church was built in 1293 . Further reconstructions and additions occurred in 18th and 19th centuries
earthquake of 1117
1117 Verona earthquake
Collegiata of Castell'Arquata