St. Nicholas Orthodox Church is a small but telling sight in Houmt Souk. Founded for Djerba's Greek Orthodox community, it sits near the port and points to the island's older Mediterranean connections: sailors, traders, and minority communities moving through a Muslim-majority island town.
It is not an elaborate monument, but it pairs well with Borj el-Kebir, the marina, and the Houmt Souk lanes. Check current opening before making a special trip; even if closed, the exterior adds a useful layer to the town's story.