Harlech Castle is one of a group of castles built by Edward I in Wales. Begun in 1283 this castle was designed and built by James of St. George, a master castle builder employed for his castle building skills by the King. The castle is built on an outcrop of rock and is defended by a moat and steep cliffs. The castle was captured by the Welsh as part of the revolt of Owen Glendower in 1404. Owen then used the castle as his base of operations against the English. The English besieged the castle in 1407 and the siege lasted until 1409 when the revolt came to an end.
Edward moved around the Welsh coast to attack and capture the Welsh castle at Criccieth. He then moved on and ordered another castle to be built at Harlech.