Gwynedd - The Welsh Castles of Edward I, Great Britain (155/418)

In the former principality of Gwynedd, in northern Wales, the castles of Beaumaris and Harlech, thanks largely to the greatest military engineer of the time, James of Saint George, and the fortified complexes of Caernarvon and Conway, all extremely well-preserved, bear witness to the works of colonisation and defence carried out throughout the reign of Edward I, king of England (1272-1307), and to the military architecture of the time.