Powis Castle is an impressive stone keep and bailey fortress, which was originally founded, in the early 13th century by Welsh princes. Built along a ridge it is now mostly Edwardian in date, with a large twin-towered gatehouse, hall block and a square keep encasing a small inner courtyard. One side of the outer bailey still retains a range of buildings and a high curtain wall, flanked by half-round towers. A mile north-east in Welshpool is Domen Gastell and 7 miles south is Montgomery Castle.