 In Sweden, the death of Gustavus Adolphus has a long tradition of being commemorated on 6 November, Gustavus Adolphus Day, despite the country's adoption of the Gregorian calendar in the 18th century.In May 1813, the Emperor Napoleon was visiting the 1632 battlefield, playing tour guide with his staff by pointing to the sites and describing the events of 1632, in detail from memory.When he heard the sound of cannon, he immediately cut the tour short and went to conduct his own Battle of Lützen.