Small Loona manor-house in Kihelkonna is a vivid example of a long and complex story of reaching it's present form. Oldest parts of the building date back to Middle Ages, the cellar uses battlements of an old vassal-castle built in the 16th century. Next major stage of building took place in 1785-1786, when the building was given most of it's present appearance.
Today Loona manor hosts a guesthouse, café and restaurant. The surrounding beautiful park is ideal for daily walks.
Reference: Visit Estonia
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.