Editing History of Denmark (section)

==== Torstenson War (1643–1645)====
[[File:Danmark før 1645.png|thumb|Denmark before 1645]]
In 1643, Sweden's armies, under the command of [[Lennart Torstensson]], suddenly invaded Denmark without declaring war. The ensuing conflict became known as the [[Torstenson War]]. The [[Netherlands]], wishing to end the Danish stranglehold on the Baltic, joined the Swedes in their war against [[Denmark–Norway]]. In October 1644, a combined Dutch-Swedish fleet destroyed 80 percent of the Danish fleet in the Battle of Femern. The result of this defeat proved disastrous for [[Denmark–Norway]]: in the [[Second treaty of Brömsebro (1645)]] Denmark ceded to Sweden the Norwegian provinces [[Jemtland]], [[Herjedalen]] and [[Älvdalen Municipality|Älvdalen]] as well as the Danish islands of [[Gotland]] and [[Saaremaa|Øsel]]. [[Halland]] went to Sweden for a period of 30 years and the [[Netherlands]] were exempted from paying the Sound Duty.

[[File:Danmark før 1658.png|thumb|Denmark before 1658]]
[[File:Scandinavia 1658.gif|thumb|right|'''Treaty of Roskilde, 1658'''.<br />{{legend|#FF0000|Halland, previously occupied by Sweden for a 30-year period under the terms of the Peace of Brömsebro negotiated in 1645, was now ceded}}
{{legend|#FFFF00|the Scanian lands and Bohus County were ceded}}
{{legend|#B404AE|Trøndelag and Bornholm provinces, which were ceded in 1658, but rebelled against Sweden and returned to Danish rule in [[Treaty of Copenhagen (1660)|1660]].}}]]

Nevertheless, Danes remember Christian IV as one of the great kings of Denmark. He had a very long reign, from 1588 to 1648, and has become known as "the architect on the Danish throne" because of the large number of building [[project]]s he undertook. Many of the great buildings of Denmark date from his reign. After the death of Christian IV in 1648, his son Frederick succeeded him.