The Russian Old-Believers (starovery) have kept their religious rituals unchanged for more than 1000 years. Today, there are 11 starover congregations with approximately 15 000 members in Estonia. A museum situated in Kolkja village on the coast of Lake Peipsi displays traditional clothes, crafts, tools, household items, and religious items of the Old-Believers.
Reference: Kolkja Museum of Old Believers
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.