This basilica was founded in 379 AD by Milan’s patron saint, Saint Ambrose.
It remains one of the few remaining examples of medieval Lombard architecture, though it underwent numerous restorations and reconstructions throughout the years.
One showpiece is the decorative canopy supported by four ancient Roman columns. Under the canopy is an elaborate 9th-century gold altar.
The second attention-getter is the 10th-century crypt. The holy relics are in a silver urn. Saint Ambrose’s body is in the middle and martyrs Gervasius and Protasius are on either side.