Trolle-Ljungby Castle, enclosed by a moat, is one of most magnificent Renaissance buildings in Sweden. In the Middle Ages it was a fortified manor house, owned by Bille family. The current castle was erected in 1629 to the grounds of the previous castle, which had been burnt down in 1525. The west wing was added in 1633 and the east wing in 1787. The stone bridge in the northern side dates from 1806. The current owner of the castle is count Hans-Gabriel Trolle-Wachtmeister with her wife countess Alice Trolle-Wachtmeister, the Swedish Mistress of the Robes.References:
Kristiansten Fortress was built to protect the city against attack from the east. Construction was finished in 1685. General Johan Caspar von Cicignon, who was chief inspector of kuks fortifications, was responsible for the new town plan of Trondheim after the great fire of 18 April 1681. He also made the plans for the construction of Kristiansten Fortress.
The fortress was built during the period from 1682 to 1684 and strengthened to a complete defence fortification in 1691 by building an advanced post Kristiandsands bastion in the east and in 1695 with the now vanished Møllenberg skanse by the river Nidelven. These fortifications were encircled by a continuous palisade and thereby connected to the fortified city. In 1750 the fortress was modernized with new bastions and casemates to protect against mortar artillery.