St. Knud’s is a traditional old village church, situated some distance to the east of Rønne town centre. It was built around the year 1150. It is the smallest church on Bornholm. The little church’s interior is of slightly more recent provenance - the altar dating from the 17th century and the interior decoration from the 18th.
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.