The Church of Our Lady (Vor Frue Kirke) is the cathedral of Copenhagen and the National Cathedral of Denmark. The present day version of the church was designed by the architect Christian Frederik Hansen in the neoclassical style and was completed in 1829.
There has been several several churches on this site since 1209. The cathedral has been rebuilt four times: The first church was burnt down and reconstructed in 1316. The second church was razed by a great fire in 1728 together with five other churches in Copenhagen and rebuilt in 1738. Finally during the bombardment of Copenhagen in 1807 the spire was hit by a Congreve rocket and nearly burnt the church down to the ground.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.