The Cathedral of St. John the Baptist^[1] (Greek: Καθεδρικός ναός του Αγίου Ιωάννη του Βαπτιστή) is a parish of the Catholic Church in Fira, on the island of Santorini in Greece.^[2][3] It serves as the cathedral of the Diocese of Santorini.

Cathedral of St. John the Baptist
Καθεδρικός ναός του Αγίου Ιωάννη του Βαπτιστή
Location	Fira, Santorini
Country	Greece
Denomination	Catholic Church
Sui iuris church	Latin Church
Administration
Diocese	Diocese of Santorini

The cathedral is located in the city center, in the Catholic neighborhood. The current church, a baroque structure of blue-gray and cream, was built in 1823. It was completely restored and rebuilt in 1970, after the earthquake of 1956.