The Oratory of San Marco is a Byzantine-style oratory situated in the old town centre of Rossano, a frazione of Corigliano-Rossano.
The church was built in the 10th century by St. Nilus the Younger as a place of retirement for nearby eremite monks and is one of the most important testimonies to Byzantine art in Italy. It is the most ancient monument in the city and was originally dedicated to St. Anastasia. It has a Greek cross plan with five characteristic domes on cylindrical drums and, in the past, the entire building was supported by very thin columns then these were covered with cement after restoration works. Between 1928 and 1934, during the restoration works, a fragment of a fresco picturing a Virgin Hodegetria was discovered.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.