Odense Odense River to the south and Naesbyhoved Lake (now dry) to the north. Nonnebakken, one of Denmark's former Viking ring fortresses, lay to the south of the river. Today, Odense's Møntergården Museum has many artefacts related to the early Viking history in the Odense area. The Vikings built numerous fortifications along the river banks to defend it against invaders coming in from the coast. The city celebrated its thousandth anniversary in 1988, commemorating the first mention of the town's name in a letter dated 18 March 988 from the German Emperor Otto III which granted rights to Odense and neighbouring
Odense boundaries were redefined in 1970. As a result, the population declined slightly in the 1970s and 1980s, falling to 136,646 in 1981. It began climbing again in the late 1980s, and steadily grew to 144,518 in 1996 and 145,554 in 2004. In 2010 Odense had a population of 166,305 people. As of 2017 it had a population of 176,683. Odense Municipality is the administrative unit which covers not only the city of Odense but surrounding suburbs and villages. Odense City Council consists of 29 members, including a mayor. The former mayor of Odense, Anker Boye, is a member of the