Conwy Castle in Wales

Conwy Castle (Welsh: Castell Conwy) (English: Conway Castle) is a medieval fortification in Conwy, on the north coast of Wales. It was built by Edward I, during his conquest of Wales, between 1283 and 1289. 

UNESCO considers Conwy to be one of "the finest examples of late 13th century and early 14th century military architecture in Europe", and it is classed as a World Heritage site The rectangular castle is built from local and imported stone and occupies a coastal ridge, originally overlooking an important crossing point over the River Conwy. Divided into an Inner and an Outer Ward, it is defended by eight large towers and two barbicans, with a postern gate leading down to the river, allowing the castle to be resupplied from the sea. It retains the earliest surviving stone machicolations in Britain and what historian Jeremy Ashbee has described as the "best preserved suite of medieval private royal chambers in England and Wales" In keeping with other Edwardian castles in North Wales, the architecture of Conwy has close links to that found in the kingdom of Savoy during the same period, an influence probably derived from the Savoy origins of the main architect, James of Saint George.