Treaty of Roskilde: After a devastating defeat in the Northern Wars (1655–1661), Frederick III, the King of Denmark–Norway is forced to give up nearly half his territory to Sweden.

The Treaty of Roskilde was negotiated at the parsonage of Høje Taastrup Church and was concluded on 26 February (OS) or 8 March 1658 (NS) in the Danish city of Roskilde during the Second Northern War between Frederick III of Denmark–Norway and Karl X Gustav of Sweden. After a devastating defeat,…