Oldenburg, city (1994 pop. 147,701), Lower Saxony, NW Germany, on the Hunte River and the Küstenkanal (Coast Canal). It is a rail junction, transshipment point, agricultural market, and industrial center. Manufactures include ships, glass, and textiles. Oldenburg was first mentioned in 1108 and was chartered in 1345. It was the seat of the counts of Oldenburg until 1667, when it passed, with the county, to Denmark. From 1777 to 1918 it served as the residence of the dukes (later grand dukes) of Oldenburg. Noteworthy buildings include the former ducal palace (17th–18th cent.) and the Gothic Lambertikirche, a church built in the 13th cent. (rebuilt 18th–19th cent.).