On the outskirts of Echternach is located one of the largest and richest estates of the northwestern provinces of the Roman Empire. The completely excavated manor house, measuring 118 x 62 m, was probably a palace. It had 40-70 rooms on the ground floor alone, provided with peristyles, courtyards, basins, marble facing, mosaic pavement and underfloor heating. This magnificent estate consisted of at least ten more buildings, which regularly lined up left and right of the estate wall and were discovered through aerial photographs and geophysical prospecting. Visitors can embark on inspecting the well-preserved basements, cellars and ornamental ponds of the estate, which resurrects in all its splendour thanks to numerous digital reconstructions. More than 70 medicinal and ornamental plants as well as a pergola covered with vines are displayed in a Roman garden.
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.