The largest church on the island, and in the city of Korcula is the stunning Cathedral of St.Mark's or Katedrala Sv.Marka. Built in the 15th century the church with its enormous bell tower can be seen peering out from the old city walls in all directions. The exterior was built in a Gothic Renaissance style by limestone from Korcula. The endless magnificant stonework on the exterior of the cathedral are stunning and varied including sculptures such as an elephant, rosettes, a lion, etc.

The bell tower and cupola were completed in 1481 by prominent Croatian artist Marko Andrijic. Numerous significant artifacts are found within the church including war relics from 1517, the Battle of Lepanto, pieta by Ivan Mestorvic, and painting by Jacopo Bassano. The church has mass services daily and is located in the old city center of Korcula. The bell tower is open for visitors during the summer months.