Gothenburg Cathedral (Gustavi domkyrka or Göteborgs domkyrka) lies near the heart of the city. The cathedral was built in 1815 and replaced an earlier cathedral built in the 17th century. The architect was Carl Willhelm Carlberg. The cathedral is a fine example of neoclassical architecture. It is one of the top tourist destinations in the city. The Cathedral acts as a venue for a wide range of classical concerts and recitals, as well as hosting regular services.
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.