"Porto Cathedral"

The city of Porto  has been the seat of a bishopric since the 5th - 6th centuries. The pre-Romanesque church is mentioned in the De Expugnatione Lyxbonensi as still extant in 1147, so construction of the present building began in the second half of the 12th century and work continued until the 16th century. There were major Baroque additions in the 18th century, and further changes were made in the 20th century.