The tower dates from the 14th century, and is all that remains of St. Martin's, the first city church. Below the clock are replicas of the quarter-jacks which once adorned the tower. The original jacks are on show in the Museum of Oxford in St. Aldate's. Last entry 30 minutes before closing. It was built by Robert d'Oilly in 1071 as a royal residence and administrative centre.
Access is limited, and it is mainly used as a filming location.
The collection includes paintings and drawings by Van Dyck and Tintoretto, and has changing exhibitions of contemporary art and drawings by the Old Masters. William Morris was married here. Built by Hawksmoor to house Oxford University Press. Statues representing the Nine Muses of Greek mythology top the roof. Not open to the public.