Basilica di Sant’Ambrogio

“One of the most ancient churches in Milan, it was built by St. Ambrose in 379โ€“386, in an area where numerous martyrs of the Roman persecutions had been buried. The first name of the church was in fact Basilica Martyrum.” source: https://en.m.wikipedia.org/wiki/Basilica_of_Sant%27Ambrogio