was known in Goor that especially small particles of this material can cause cancer. In major parts of the city the soil had to be removed and either cleaned or replaced by non-polluted material.

Delden achieved its city rights in 1333. Its circle-shaped centre was surrounded by earthen walls. It came into existence thanks to the Twickel castle, situated less than one mile north of Delden. This castle, that in its present form dates from the 17th century, is still