St. Quentin Cathedral in Hasselt was granted to a cathedral in 1967, but its construction began already in the 11th century. The first church was built inthe 8th century and rebuilt in Romanesque style in the 11th century. The cathedral construction continued several centuries. In the 15th century the choir was rebuilt. During the iconoclasm the tabernacle and statues, the altar lateral and the main altar were destroyed. The tower of the present church dates from 1725; it was restored in the 19th century.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.