Conwy Castle, Wales, is one of the most prominent fortresses built by Edward I in the 13th century. It is one of the key castles of the king's "iron ring" of fortresses constructed in Wales. The stronghold was quite an expensive undertaking - it is estimated that Edward spent £15,000 (£162 million in 2009) on the construction, which makes it the most costly castle in the Welsh history. Today Conwy is declared a World Heritage Site.
Conwy Castle- magnificent castle construction began in 1283. The castle was an important part of King Edward I's plan of surrounding Wales in "an iron ring of castles" to subdue the rebellious population. The highly defensible wall Edward built around the town was intended to protect the English colony planted at Conwy. The native Welsh population were violently opposed to English occupation of their homeland.