The Architecture of the Basilica
The basilica was originally built by St. Ambrose, bishop of Milan, between 379–386 AD. The basilica stands on the site of a cemetery housing the remains of numerous martyrs of Roman persecutions, and St. Ambrose was himself laid to rest here in the year 397. Since then, the basilica has been expanded and reconstructed several times over the centuries. The rebuilt aisles and vaulted nave date from 1128, the atrium from around 1050 and the narthex from 1095–96. Then, between 1492 and 1497, Donato Bramante was commissioned to redesign sections of the basilica and its chapel based on his designs of St. Peter's Basilica in Vatican City.