 Industrial expansion in the 1970s and 1980s displaced old villages of Weiwerd and Heveskes which are remembered in photos and local monuments maintained by previous residents.Foundations of a ruined monastery were discovered in the excavations of Heveskes mound, together with a monolithic tomb dated from 3400 BC which was disrupted about 2200 BC and was displayed in the Aquarium Museum at Delfzijl, until recent developments caused the building to be demolished.The monastery was mentioned in records of 1319, and was destroyed in war in 1586.