Basilica of San Martin de Mondoñedo
The Basilica of San Martin de Mondoñedo is a church in the municipality of Foz in Galicia (Spain). It is considered the oldest cathedral in Spain; it was the seat of two bishops in the ninth century.
The current church, of Romanesque architecture, dates from the late eleventh century; it was reinforced with buttresses during the eighteenth century.
Coordinates: 43°33′42″N 7°18′12″W / 43.5617°N 7.3033°W
...
Wikipedia