The Vasa, Sweden’s first royal warship, sank in Stockholm harbor on 10 August 1628, killing approximately 30-50 crew members and visitors. The vessel, commissioned by King Gustavus Adolphus of Sweden for the ongoing war against Poland-Lithuania, was built at the Stockholm shipyard under master shipwright Henrik Hybertsson. Over 95% of the original ship survives, making it the best-preserved 17th-century vessel in Scandinavia. The Vasa Museum opened on Djurgården island, Stockholm, on 15 June 1990.