San Cassiano is a 14th-century Roman Catholic church located in the San Polo sestiere of the Italian city of Venice. A church has stood on the site since 726 with the present building dedicated to Saint Cassian of Imola being consecrated in 1376 and re-modelled during the 17th century. It has a plain exterior with several adjacent buildings overlapping it. Its interior however is richly decorated in a Baroque style.
The church is located on the Campo San Cassiano, site of the world's first public opera house, west of the Rialto Bridge and is open to visitors Tuesday-Saturday mornings.
Wikipedia https://en.wikipedia.org/wiki/San_Cassiano,_Venice
Address 1758 Calle del Campaniel, Venezia 30125, Italy
Coordinates 45°26'22.978" N 12°19'55.724" E