Later, the Pontians built further churches and castles. Balatlar Church is a Byzantine church dating back to 660. It lies on the Black Sea coast. Despite vandalism and natural deterioration, the church still has old frescoes, which have been of interest to modern historians. The actual structure itself may date to Roman times. It likely had different uses over the centuries, potentially being a public bath and gymnasium before its use as a church. Pottery found at the site dates to the Roman and Hellenistic eras. There is also speculation that a piece of the True Cross was found at Balatlar Church; however, it's more likely that the materials found were actually the relics of a saint or other holy person.