. . . "Karlsborgs f\u00E4stning"@en . "Karlsborg Fortress"@en . "Karlsborg Fortress (Swedish: Karlsborgs f\u00E4stning) is situated on the Vann\u00E4s peninsula in Karlsborg by lake V\u00E4ttern, the province of V\u00E4sterg\u00F6tland, Sweden. Construction on the fortress began 1819 to realize the so-called central defense idea adopted by the Swedish military after the Finnish and Napoleonic Wars. The site was chosen by Baltzar von Platen in connection with the construction of G\u00F6ta kanal."@en . "\u20131909" . .