Oscarsborg consisted of the Coastal Artillery officer training programme. The officer school was officially shut down on 28 June 2002. The fortress is now largely a civilian resort and attraction, open for visitors. Parts of the former fortress are used as a hotel resort. The scenic surroundings is much used for conferences and excursions. Visitors take a short motor launch trip from Drøbak. On 8 April 2014 the 28 cm guns of the main battery were fired with blank rounds when the fortress was used as a location of a scene for the production of the 2016 film The King's Choice, directed by Erik Poppe. In their coverage of the filming the newspaper Aftenposten claimed that the filming occasion was the first time the guns had been fired since 9 April 1940. The claim by Aftenposten is however contradicted by the fact that the guns were actually last fired during testing in 1952. After a prolonged process, Oscarsborg Fortress was listed as a protected site in 2014, effective from 9 April 2014. Footnotes Literature External links Oscarsborg Fortress (Visit Follo) Oscarsborg Hotel & SPA The official website for the fortress today Oscarsborg Museum website Forts in Norway Military and war museums in Norway Military history of Norway during World War II World War II sites in Norway Frogn Museums in Viken Protected areas of Norway Military installations in Viken Military installations established in 1848 1848 establishments in Norway Military installations closed in 2002 2002 disestablishments in Norway