The church of Saint Agnes Outside the Walls is a titulus church, minor basilica, which runs north-east out of the city, still under its ancient name. What are said to be the remains of Saint Agnes are below the high altar. The church is built over the Catacombs of Saint Agnes, where the saint was originally buried, and which may still be visited from the church. A large basilica with the same name was built nearby in the 4th century and its ruins can be seen near Santa Costanza, in the same site. The existing church was built by Pope Honorius I in the 7th century, and largely retains its original structure, despite many changes to the decoration.