Each guardhouse is staffed by several armed police officers. The entrance of the campus is marked with a small guardhouse on the left. The Fort Clark Guardhouse became a Recorded Texas Historic Landmark in 1962. One of the caponiers survives and is accessible from Guardhouse Square by a narrow staircase. Norton took the county men to Fort Elliott to be placed in the guardhouse. This one-story brick building was the guardhouse and the post prison. The main front wall was extended outwards, to form Guardhouse Square. It is a copy of a guardhouse at Windsor Castle. The lean-to extensions, including the guardhouse, were demolished around 1815. The buildings within Guardhouse Square date from the 19th century. In early September, construction commenced on the wall and a guardhouse. Udet was placed under arrest in the guardhouse for seven days. The Neue Wache is a Greek Revival guardhouse in Berlin, by Karl Friedrich Schinkel (1816). The first modern guardhouse was manufactured by Par-Kut International in 1954. The chapel(Building 42) was built between 1886 and 1889 as the post guardhouse.