Hemse, Sweden
12th century
Ljugarn, Sweden
13th century
Näs, Sweden
13th century
Sproge, Sweden
13th century
Gotland, Sweden
12th century
Ljugarn, Sweden
14th century
Visby, Sweden
c. 1200
Gothem, Sweden
13th century
Silte, Sweden
13th century
Halla, Sweden
c. 1200
Stenkyrka, Sweden
13th century
Hangvar, Sweden
13th century
Gerum, Sweden
c. 1200
Guldrupe, Sweden
12th century
Tingstäde, Sweden
13th century
Lye, Sweden
12th century
Visby, Sweden
12th century
Tingstäde, Sweden
12th century
Väskinde, Sweden
1250
Visby, Sweden
13th century
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.