page_title: Alt-Regensberg Castle
section_title: Keep and palas
hierarchical_section_title: Alt-Regensberg Castle / Architecture / Keep and palas
caption_attribution_description: Altburg (Alt-Regensberg) in Regensdorf (ZH)
context_page_description: Alt-Regensberg Castle is a hill castle which was built about the mid-11th century AD by the House of Regensberg in the Swiss municipality of Regensdorf in the Canton of Zürich.
context_section_description: The quadratic keep measures about 9 metres (30 ft) with about 3 metres (10 ft) thick walls and dates from the first construction phase. Its foundation goes about 4 metres (13 ft) below the earth's surface, and it is completely filled up to the surface-accessible at height of about 5.5 metres (18 ft). This massive construction should prevent that besiegers undermined the tower. The lowest floor was lit by wall slots. The elevated entrance was on the west side of the tower and was originally accessible by a ladder and a simple wooden platform. Later, there was a staircase in the north-west corner up to the entrance. The exterior of the residential tower has been transformed remarkably over the years. The outer casing of the 11th-century structure was filled with boll stones and mounted in horizontal mortar joints strokes. By 1200 the entire outer surface was chipped away and replaced with carefully edited boss squares. The whole tower thus received a much more upmarket appearance.
  In the northern part of the complex is a rectangular foundation wall leaning against the perimeter wall. Here arose in the 12th or early 13th century wooden buildings that served as stables and outbuildings. They were moved to the south and replaced by a palas in the course of the 14th century claimed the whole area between keep and circular wall in the northeastern area. The residential construction had two 2 metres (7 ft) wide cross walls to the west and south. Later the palas was expanded to the south. At the site the reservoir that was built in 1919, was a massive stone building serving as a cellar and storage since the 13th century.
caption: the ill-reconstructed entrance area towards the kepp
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