DUDERSTADT, town, Prussian province of Hanover, Ger many, situated in a beautiful and fertile valley (formerly called Goldene Mark) watered by the Hahle, and on the railway Wulften Leinefelde. Pop. Duderstadt was founded by Henry I. (the Fowler) in 929, passed later to the monastery of Quedlinburg, and then to Brunswick. It was a member of the Hanseatic League, and during the Thirty Years' War became a stronghold of the Imperialists. It was taken by Duke William of Weimar in 1632 ; in 1761 its walls were dismantled, and it passed finally in 1866 with Hanover to Prussia. It is an interesting mediaeval town with many ancient buildings. There are two beautiful Gothic churches of the i4th century. It makes gloves, hats, paper, cigars and bricks; it has also a trade in singing-birds.