Älvsborg Fortress
Älvsborg Fortress (Swedish: Älvsborgs fästning), with its main facility Oscar II's Fort (Swedish: Oscar II:s fort) built 1899–1907, is a now-defunct Swedish fortification located at the mouth of the Göta River in the Älvsborg district of Gothenburg, Sweden. == History == Construction of the fortress began in 1899 and was completed in modern condition in 1907.