Oscarshall is a 19th-century summer palace on the Bygdøy peninsula in Oslo, Norway. Built between 1847 and 1852 for Oscar I of Sweden and Queen Joséphine, the palace was designed by Danish architect Johan Henrik Nebelong. Its exterior and surroundings represent one of the finest examples of neo-Gothic and National Romantic architecture in Norway, while the interior — furnished and decorated by Norwegian artists — showcases mid-19th-century Norwegian art and craftsmanship. Since 1881 it has been open to the public as a museum, and after a full restoration completed between 2005 and 2009, it once again welcomes visitors during the summer season.