Although in ruins, Kildrummy Castle is significant because it dates to the 13th century and has ties to the mainstream medieval traditions of European castle building. It shares features with Harlech and Caernarfon, in Wales, as well as with Château de Coucy, near Laon, France. Kildrummy underwent several expansions at the hands of England's King Edward I (1239–1307); the castle was back in Scottish hands in 1306, when it was besieged by King Edward I's son. The defenders were betrayed by Osbarn the Smith, who was promised a large amount of gold by the English forces. They gave it to him after the castle fell, pouring the molten metal down his throat, or so the ghoulish story goes. Kildrummy's prominence ended after the collapse of the 1715 Jacobite uprising. It had been the rebel headquarters and was consequently dismantled. Although the castle is almost completely ruined, its unadorned yet strangely moving chapel remains intact.