Leeds Castle was originally an 11th century earthwork motte and bailey fortress, founded by Hamon de Crevecoeur. His son Robert, founded the stone castle, when adding a shell keep to the motte and a gatehouse to the bailey. In the 13th century, the marshes around the castle, were formed into an enormous lake, with the dam supporting a complex system of barbicans and sluices. In 1278, King Edward I rebuilt the shell keep, to make the Gloriette and founded a concentric castle when adding a low curtain wall, flanked by D-shaped bastions. 4 miles south-west is Sutton Valence Castle.