Basilica of Sant'Ambrogio built
300 CE.
Shown on the map at 45.462°, 9.176°.
The Basilica of Sant'Ambrogio, officially known as Basilica romana minore collegiata abbaziale prepositurale di Sant'Ambrogio (Lombard: Basilica romana menyor collegiada abbaziala prepositulara de Sant'Ambroeus), is an ancient Romanesque-style, Roman Catholic church located in the center of Milan, in the region of Lombardy, Italy.
Text from the Wikipedia article Basilica of Sant'Ambrogio, licensed CC BY-SA 4.0.