St. John the Baptist Cathedral, Santorini
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| Cathedral of St. John the Baptist | |
|---|---|
Καθεδρικός ναός του Αγίου Ιωάννη του Βαπτιστή | |
St. John the Baptist Cathedral | |
Location of the cathedral in Greece | |
![]() Cathedral of St. John the Baptist | |
| 36°25′13″N 25°25′50″E / 36.4203°N 25.4306°E | |
| Location | Fira, Santorini |
| Country | Greece |
| Denomination | Catholic Church |
| Sui iuris church | Latin Church |
| History | |
| Status | Cathedral |
| Dedication | John the Baptist |
| Architecture | |
| Functional status | Active |
| Architectural type | Church |
| Style | Baroque Revival |
| Completed | 1823 |
| Specifications | |
| Number of domes | 1 |
| Number of towers | 1 |
| Administration | |
| Diocese | Santorini |
| Clergy | |
| Bishop | vacant (as of December 2025[update]) |
The Cathedral of St. John the Baptist[1] (Greek: Καθεδρικός ναός του Αγίου Ιωάννη του Βαπτιστή) is a Roman Catholic cathedral located in Fira, on the island of Santorini, in the South Aegean region of Greece.[2][3] The cathedral church serves as the seat of the Bishop of Santorini.

The cathedral is located in the city center, in the Catholic neighborhood.
The Baroque Revival-style structure of blue-gray and cream, was built in 1823 and was completely restored and rebuilt in 1970, after the earthquake of 1956.
