In 2003, a historical and archaeological investigation by Peter Brown and Peter King identified that the outer bailey of the castle had been two elaborate gardens and surrounded by water in the 14th century. This discovery was significant in that it proved the advanced state (as compared to those of the French or Flemish) of English gardening habits. The "lavish" garden was installed by one of the FitzWarin family. The viewing mound in the centre may be the oldest of its type yet discovered in England.