Foto de stock - Loarre Castle was designated a World Heritage Site in 2007. In the foothills of Sierra de Loarre stands the oldest fortified castle in Spain and the most spectacular in Aragon. The complex was built largely during the 11th and 12th centuries, when its position on the frontier between Christian and Muslim lands gave it its strategic importance. The Homage tower was built in an isolated position in front of the fortifications, to which it was connected by a wooden bridge. It contained a basement and five floors. After 1070, Loarre became increasingly important. In 1073, King Sancho installed a community of Augustinian canons, and it was from Loarre that he prepared for the conquest of Huesca in 1094.