Great Britain
www.castles-of-britain.com
Wales
www.castleswales.com/home.html
www.castles.org/directory/castles_in_england.htm
vi.uh.edu/pages/castlepage.html
Czech republic(9) Slovakia(3) Poland(6) Germany(7) Austria(4) France(4) Portugal(3) Italy(3) Luxemburg(1) Ireland(3) Belgium(4) Hungary(2) Switzerland(3) Roumania(3)