The St. John the Baptist Cathedral is a Roman Catholic church in Santorini, Greece, and serves as the cathedral of the Roman Catholic Diocese of Santorini which was created in 1204.
The cathedral is located in the city center, in the Catholic neighborhood. The church was built in 1823 and was completely restored and rebuilt in 1970, after the earthquake of 1956. The building is baroque and blue gray and cream are combined.
Wikipedia https://en.wikipedia.org/wiki/St._John_the_Baptist_Cathedral,_Santorini
Coordinates 36°25'13.931" N 25°25'50.786" E