Eleven new tourist information boards have been installed around Oxford city centre and four more are being prepared for the new Castle development. The new boards have maps and information highlighting points of local and historical significance such as the fact that of the 25 British prime ministers who studied at Oxford, 13 were educated at Christ Church, and that the old Ashmolean (now the Museum of History of Science on Broad Street) is the oldest public museum in Britain. The boards are in Broad Street, Turl Street, Oriel Square, St Giles, Radcliffe Square, The Oxford Canal, The Martyrs' Memorial, Folly Bridge, New College Lane, Christ Church and Magdalen Bridge.