Jedburgh Castle
Scottish Borders, United Kingdom · built 1100
Jedburgh Castle was a castle at Jedburgh in Scotland. It was fought over during the Wars of Scottish Independence, and was demolished by the Scots commanded by Sir James Douglas of Balvenie in 1409. The site of the original castle was used to build the reform prison based on the John Howard system, the construction of which started in 1820.
Prison data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).