The building of the Church of St. Martin itself (Eglise Saint-Martin) was erected in the neo-Greek style in 1821 (the previous building collapsed on the night of August 29.1818), but the bell tower was inherited from the 14th century. The cathedral is famous for its organ, which was restored in 1983 and consists of 5.000 pipes and three keyboards. Address: Boulevard Marceau. Free admission.→