The oldest part of the St. James parish church is the tower chapel (10th century) with two compact columns and cube-shaped capitals (Chapel of Grace today). The church was erected in the 12th century as the result of a vow made by Engelhard Brömser who had promised to build a church if he returned home safely from his captivity by the Moors. The Gothic hall church from the 14th/15th century is also a gift from the Brömser family. It was completely renovated in 1719. In 1766 a 'pigtail helmet' (onion tower) was added to the Romanesque church tower and a Baroque high altar was installed. An ambitious expansion of the parish church was carried out in 1913-1914. On 25 November 1944, the church was almost completely destroyed during a heavy bomb attack. Immediately after World War II, work began to rebuild the church as a hall church incorporating the preserved old parts. St. James' Church was consecrated in 1955.
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.