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 which comprises the Danish Route 9. Other, smaller routes connect Odense to the rest of Funen, with direct links to all coastal towns. In 2015 plannings were established on Denmarks first Diverging diamond interchange (DDI), called "Dynamisk Ruderanlæg", upgrading the diamond interchange number 52 on Fynske Motorvej (E20), crossing the roadways of Assesvej by following the US-american design of DDIs at On 17 September 2017, the redesigned interchange opened for traffic. Computer aided simulation and land usage resulted the DDI as the adequate solution. Odense is served by Odense Airport, which operates flights to tourist resorts, mainly in the summer