In 1661, he was put in charge at Vordingborg and appointed commander Kalø Castle in Århus. In 1657 he became colonel in Norway. Gyldenlove participated in the Dano-Swedish War, where he distinguished himself in the Battle of Nyborg on 14 November 1659.
Civil career and holdings in Norway
In 1664 Gyldenløve was appointed viceroy of Norway, replacing Iver Krabbe. He studied conditions in Norway very carefully, and became a strong advocate for many important reforms, such as a simplified tax system and the establishment of a Court of appeals in Norway separate from the one in Denmark. He is also remembered for his role in the construction and improvement of nine fortresses along the Swedish border. Gyldenløve took part in the 17th-century Dano-Swedish wars where he was particularly successful at the Battle of Nyborg on 14 November 1659. In 1666, he became commander-in-chief of the Norwegian army which was victorious in the Scanian Wars. Gyldenløve implemented the reforms initiated by the prior Governor-general Hannibal Sehested effecting taxation, defence and justice and protection for tenant farmers. He was also active in Danish politics from 1670 in association with Peder Griffenfeld who served as Chancellor of Denmark. In 1671, Gyldenløve founded the city of Laurvig, and was named Count of Laurvig. In Larvik, he is remembered for the construction of Larvik Church, its main church as well as Laurvig Manor House, which is still one of the largest wooden structures in Norway. Larvik Church was inaugurated in 1677. Gyldenløve issued a gift to the church where the interest on the capital was to be used for maintenance. Laurvig Manor House was built beginning in 1674 and was completed for his third wedding with Antoinette Augusta von Aldenburg in 1677.
Gyldenløve Chamber
The site of Gyldenløve Chamber in Copenhagen, later to be known as Charlottenborg Palace, was donated by King Christian V of Denmark to his half brother Ulrik Frederik Gyldenløve on 22 March 1669 in connection with the establishment of Kongens Nytorv. Gyldenløve built his new mansion from 1672 to 1683 as the first building on the new square.
Family
Count Ulrik Frederik married three times: Marie Grubbe from whom he was divorced after nine years in 1670. He wed secondly, Sophie Urne, daughter of Jørgen Urne and Margrete Marsvin. His third wife was Countess Antoinette Augusta von Aldenburg, eldest daughter of Anton I, Count von Aldenburg und Knyphausen, legitimated son of Anton Gunther, who belonged to the Delmenhorstcadet branchof the House of Oldenburg whose senior line became hereditary kings of Denmark. Ulrik Frederik's two first marriages ended in divorces, but he has descendants from the second and third. He had many children, both legitimate and illegitimate, four of whom lived to adulthood, married and left descendants: By Sophie Urne:
