St Briavels Castle, St Briavels, Gloucestershire
The castle is thought to have been built on the site of an earlier motte and bailey castle. It was built after William Fitz Baderon acquired the estate in 1086. Between 1209 and 1211 there were extensive additions to the castle. These included a domestic range providing 'royal apartments', and a twin towered gatehouse. The gatehouse was rebuilt by Edward I between 1292 and 1293. This is the main structure that can be seen today. In 1680 several parts were demolished. In 1752 the keep collapsed and in 1777 the east tower collapsed. It was used as a prison until 1842 before restoration in the late 19th century. It has been used as a youth hostel since 1952. This site is now in the care of English Heritage (2010). Find out more.