St. Michael's Church was built in the Early-Gothic architectural style, first mentioned in 1282, in 1449 burned down by a fire and subsequently rebuilt. The expansion work on the church in the fifteenth and sixteenth-century was blighted by the Thirty Years' War and as such was burned down again. Prior to 1671, the church was renovated by Bishop of Wrocław, Sebastian von Rostock. The church was restored in 1893.
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.