The Church of St. Nicholas. Yes, the Santa Claus one. He was born in Patara and was bishop here. He was once buried here, but half his bones were removed by Italians in 1087 and are now in Bari, Italy. The rest were nabbed by the Venetians in 1100 and are in church on the Lido. (DNA tests have confirmed that the bones in Venice and those in Bari come from the same skeleton.) There are, unsurprisingly, many other places that claim to have a bit of his remains.
There is a curious story about the bones:
It is said that in Myra the relics of Saint Nicholas each year exuded a clear watery liquid which smells like rose water, called manna (or myrrh), which is believed by the faithful to possess miraculous powers. After the relics were brought to Bari, they continued to do so, much to the joy of the new owners. Vials of myrrh from his relics have been taken all over the world for centuries, and can still be obtained from his church in Bari. Even up to the present day, a flask of manna is extracted from the tomb of Saint Nicholas every year on 6 December (the Saint's feast day) by the clergy of the basilica. The myrrh is collected from a sarcophagus which is located in the basilica vault and could be obtained in the shop nearby.
This version of the church dates back to the 700s.