It's often interesting to delve into differing beliefs. A trip to Church of San Sebastiano is a good way to deepen your knowledge of one of the local religions and ways of life.
This Dorsoduro house of prayer is a good spot to start your day of sightseeing. There's loads to do and see in the vicinity, like Rialto Bridge, St. Mark's Basilica, and St. Mark's Square. Take your time at Church of San Sebastiano before hitting up these other fine sights.