Events from the year 1665 in Denmark.
Incumbents
Monarch - Frederick III
Events 14 November – The King's Law or Lex Regia (Danish and Norwegian: Kongeloven) was introduced.
Undated
Births
14 May – Hans Seidelin, civil servant and landowner (died 1740) 30 September Knud Juel, landowner and county governor (died 1709)
Deaths 7 April Henrik Ernstt, jurist (born 1603) Full date unknown
References