Purtse vassal castle manor was built by Jakob von Taube in 1533, as a mixture between a defensive structure and a residential manor. Such structures were not built as strategic fortresses in case of war but rather as dwellings that provided protection against uprisings by Estonian peasants and provided a stronghold from which to control the surrounding area.
Purtse remained in the possession of the Taubes until 1615. After that, ownership of the manor transferred to Heinrich Fleming, who belonged to the peerage of Sweden. The party hall of the stronghold was decorated with colourful tiled stoves and baroque leather wallpaper. Purtse vassal stronghold has been burnt down and rebuilt several times throughout its history. The building suffered particularly badly during the Livonian War and the Great Northern War. The tower and defence floor of the building were destroyed in the Great Northern War (1700-1710).
The building has had many functions during its existence. It has been the home of a feudal family, offered protection in times of war and in later times it has served as a cold cellar, milk chamber, grain storage, a prison and a workers' residence.
The castle was left in ruins in the 1950s and restored from 1987 to 1990. Today it is open to the public from May to September. The castle popular venue for weddings and events.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.