Exeter Castle is an interesting Norman stone ringwork fortress, founded by Baldwin de Brionne. The entrance with its projecting barbican, is an 11th century square three storey gatehouse, with above the gate-passage, chambers lit by unusual triangular-headed windows. Its strong earthworks and curtain wall are flanked by square and round towers, which command the north-west corner of old town wall. Sadly in the 18th century, all the remaining medieval buildings inside the walls were levelled, to make way for the Georgian Assize County Courts. 8 miles south is Powderham Castle and 15 miles north is Tiverton Castle.