1651 in Denmark

• Monarch – Frederick III{{cite web|title=Frederick III: king of Denmark and Norway|url=https://www.britannica.com/biography/Frederick-III-king-of-Denmark-and-Norway|website=Encyclopedia Britannica|access-date=18 November 2019|language=en}}
• Steward of the Realm – Corfitz Ulfeldt (until July), Joachim Gersdorff

• 11 July – The dispute between Corfitz Ulfeldt and Dina Winhofers culminates with the latter's execution. Ulfeldt and his family secretly leave Copenhagen on 4 July.{{cite web|url=http://www.kobenhavnshistorie.dk/bog/khsd/1600/1651.html|title=1651|language=da|publisher=Selskabet for Københavns Historie|access-date=2012-11-01|archive-url=https://web.archive.org/web/20140222002910/http://www.kobenhavnshistorie.dk/bog/khsd/1600/1651.html|archive-date=2014-02-22|url-status=dead}}

• The House of the Holy Ghost in Copenhagen is turned over to the Church of the Holy Ghost.
• Kunstkammeret ("Royal Art Cabinet") is mentioned for the first time.
• Plague rages in Denmark.

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• 7 July – Dina Vinhofvers, silk worker and accuser of Corfitz Ulfeldt (born 1620)

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Denmark

Category:Years of the 17th century in Denmark