The church of Saints Julián and Basilisa was originally built in the late twelfth century. Two inscriptions are provided, one, on the west window of the portico, dates the work to 1186 and names the sculptor Juan de Piasca, and the other on the baptismal font, states its creation date of 1195. In the sixteenth century, however, the building was heavily reconstructed, leaving only the portico generally intact, albeit walled in. It remained enclosed until the building's modern restoration in 1928. The portico is heavily decorated, including a row of figural and vegetal capitals sculpted in the round, a carved alfiz, and numerous corbels.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.