Long weekend back home in #EastFrisia / #Ostfriesland. Walked by the Harderwykenburg in Leer, one of the few remaining tower castles from the period of the warring East Frisian chieftains. The brick tower was built under Hayo Unken II Ripperda in the 15th century and known back then as the Unkenburg. In early modern times, the castle was converted into a mansion and the defensive moat was backfilled. #CastleContent