Database: San Giacomo di Rialto

Originally founded in 421, San Giacomo is believed to be the oldest church in Venice, although the current building was constructed around 1071.

The 15th Century facade is crowned with a magnificent 24-hour celestial clock. During the Renaissance, the church was typically used by the merchants in the nearby market as a place to stop and pray during the workday.

At least, that's what they told their wives.