San Cassiano
Comacchio Cathedral (), also the Basilica of San Cassiano, is a Baroque Roman Catholic cathedral and minor basilica dedicated to Saint Cassian of Imola ("San Cassiano") in the city of Comacchio, in the province of Ferrara, Emilia-Romagna, Italy. Formerly the seat of the bishops of Comacchio, it has been since 1986 a co-cathedral in the Archdiocese of Ferrara-Comacchio.