The excavations in the South Harbour in 2011 yielded an unexpected discovery, a small chapel. The chapel located at the eastern edge of the port and adjacent to the wall of the breakwater pier has two aisles and two apses. To the east of the apses there are traces of two larger apses indicating the existence of an earlier and larger church. Built in east – west direction, the chapel has a rectangular plan with dimensions around 11.4 m x 5.2 m. although we do not have any evidence to closely date or to understand the usage of the chapel, some ceramics and coins point to the existence of the chapel in 10th – 12th century AD.