• Monarch — Christian IV^[1]
• Steward of the Realm — Corfitz Ulfeldt

• 3 March — Simon Paulli gives his first public lecture in the new Domus Anatomica in Copenhagen.^[2]
• 25 May – HDMS Stora Sofia sinks near Buskär outside the harbour of Gothenburg.
• 13 August — The Second Treaty of Brömsebro is signed, putting an end to the Torstenson War. The island Øsel is ceded to Sweden.

Undated edit

• Stephanius publishes Saxonis Grammatici Historiæ Danicæ Libri XVI, a Latin edition of Saxo Grammaticus's Gesta Danorum.

Art edit

• Abraham Wuchters creates a full-length portrait of Ulrik Christian Gyldenløve.

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  Abraham Wuchters' portrait of Ulrik Christian Gyldenløve.

• January 31 — Hans Ulrik Gyldenløve, diplomat, illegitimate son of Christian IV