The church of Odensala was built in the late 1100s. The sacristy and tower were added later. The brick-made portal dates from the late 1200s. The arches were added in 1300s. Odensala church is famous for its colorful and expressive lime paintings from the 1500's by Albertus Pictor or his workshop. The altarpiece was made in 1514, but is today in museum. The pulpit is a gift from Count Karl Gyllenstierna (1714).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.