Salzburg, Austria
1077
Heidenreichstein, Austria
12th century
Linz, Austria
8th century
Werfen, Austria
1075-1078
Steyr, Austria
985 AD / 18th century
Innsbruck, Austria
1563
Kufstein, Austria
c. 1205
Hochosterwitz, Austria
c. 860 AD
Riegersburg, Austria
1122
Schönbühel-Aggsbach, Austria
1180
Rosenburg, Austria
1593-1597
Forchtenstein, Austria
15th century
Feldkirch, Austria
12th century
Schallaburg, Austria
1540
Dürnstein, Austria
1140-1145
Perchtoldsdorf, Austria
10th century
Villach, Austria
16th century
Raabs an der Thaya, Austria
c. 1050
Gmunden, Austria
c. 1080
Reutte, Austria
1296
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.