The Monolithic Church of Saint-Emilion is an underground church dugged in the early 12th century of gigantic proportions (38 metres long and 12 metres high). At the heart of the city, the church reminds the religious activity of the city in the Middle Ages and intrigues by its unusual design. If it shows itself in the eyes of the visitor by the position of a 68-meter-high bell tower, then it hides itself behind the elegance of three openings on the front and a Gothic portal often closed.
The goal of its realization is probably the development of the city around a pilgrim activity on the tomb of the patron saint St. Emilion. In memory of the Breton hermit who had settled in a nearby cave during the 8th century, and in order to edify the faithful, the ambition to achieve a sufficiently large reliquary church to host hundreds of pilgrims, was born.
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.