Near the only remaining gate of the Old City walls (dating from 1214), this is said to be the one surviving medieval parish church in Dublin. Although it is partly in ruins, significant parts have survived, including the west doorway, which dates from 1190, and the 13th-century nave. (Note: While this St. Audeon’s is Church of Ireland, nearby is another St. Audeon’s Church, dating only to 1846 and Catholic. There, Father “Flash” Kavanagh used to say the world’s fastest Mass so that his congregation could be out in time for the football matches.) Entrance to the ancient St. Audeon’s is through a visitor center, which offers a self-guided exhibit on the church’s history; visits to the church itself are by guided tour, and only from April to October.