The chapel in Saha used to be one of the oldest ecclesiastical centres of Rävala Maakond (Shire). Originally, Saha Church was made of wood, it was burnt down around 1223. Four cult stones with small hollows dating from the 1st millennium BC, located close to the chapel indicate that it had been an ancient cult place. The current chapel was built by builders from Tallinn in the second quarter of the 15th century.
Structurally, the chapel bears striking similarities to Pirita Klooster. This simple double-vaulted parallelogram-shaped buiding is slightly asymetrical. Several construction details, like very high placed windows, a corner tower, a high gable roof etc., show that in addition to serving as the house of god, the Chapel had other functions as well. In case of necessity it could become a fortified stronghold protecting against enemy attacks, a resting place for pilgrims or a storage room for merchants. The chapel was badly damaged during the Great Northern War and was restored as recently as 1962-1969.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.