Cold Knap is the site of the monument that is Glan Y Mor. This is a Roman building situated just behind the car park. Roman Fort Excavation - The Knap - source: https://www.peoplescollection.wales/items/1226891 An artists impression of what the Roman fort may have looked like Cold Knap Farm still remains at the Knap and is the oldest domestic building in Barry. It was built in 1570 and extended in the 17th Century. A farmer called Richard Garby once lived in… Read more.