The upper castle of Arnad is mentioned first time in a papal letter in 1207, but there is no information about its origins or first owners. It was probably built by Saverio di Arnad in the late 12th or early 13th century.
The next owners, Vallaise family, lived in the castle throughout the 14th century. Due to the inadequacy of the structure and the lost military function, the castle was abandoned in the 15th century.
Today the castle lies in ruins.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.