Carlow Castle in located in Carlow Town. This was one of the finest Norman castles ever built in Ireland. It was built around 1213 by William Marshall and the site was carefully chosen because of it’s strategic defensive location close to the River Barrow. In 1361 it was strengthened when it became the headquarters of the Exchequer of Ireland when it was moved here from Dublin. Although it was attacked and withstood a number of attempted assaults in 1494 and 1641, it’s great ‘low point’ came not through war but by a physician named Middleton. Middleton attempted to convert the castle into a lunatic asylum in 1814 when he tried to diminish the thickness of the walls by using explosives. He however made a gross miscalculation and ended up blowing most of the castle to pieces. All that remained were the 2 towers and a bit of the original wall…Only in Ireland!