Basilica of San Simpliciano
Milan, Italy
The Basilica of San Simpliciano is an ancient Roman Catholic church in the centre of Milan, region of Lombardy, Italy: the church, commissioned by the 4th century bishop St Ambrose, is the second-oldest known Christian church with a Latin cross layout. It is dedicated to Saint Simplician, who was Ambrose's successor as bishop of Milan.
Church data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).