Zürich, Switzerland
1486
Bern, Switzerland
1421
Zürich, Switzerland
1100-1220
Zürich, Switzerland
853 AD
Geneva, Switzerland
15th century
Geneva, Switzerland
c. 1160
Zürich, Switzerland
c. 1230
Lucerne, Switzerland
1667
Basel, Switzerland
12th century
Bern, Switzerland
13th century
Bern, Switzerland
1341
Lausanne, Switzerland
1170-1275
St. Gallen, Switzerland
747 AD
Solothurn, Switzerland
1772-1773
Basel, Switzerland
1857-1864
Zürich, Switzerland
1231
Stein am Rhein, Switzerland
1007
Sion, Switzerland
11th century
Geneva, Switzerland
1852-1857
Fribourg, Switzerland
1283
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.