The church of Plouzané is dedicated to Saint Sané, who can be identified with Senan, a bishop who came from Ireland in the 6th century to evangelize the Breton peninsula.
Built on the probable site of an ancient temple, nothing remains of the earlier edifice. The current church, the work of Pierre Besnard, a civil engineer, dates from 1781 and was restored after damage in 1944.
The overall plan exudes a severe nobility. The nave, with three aisles and four bays, widens into the transepts and choir, which end in semicircles. The space is divided by eighteen square piers supporting semicircular arches. The pavement is composed of numerous reused tombstones. The west portal is a monumental construction with Doric columns with a triangular pediment and, above, a circular floor with a balustrade, square tower and pyramidal spire framed by pinnacles.