Sanctuary de Sant Salvador, an old hermitage, 509m above sea level at the highest point of the Serra de Llevant was the senior house of Mallorca's monastic order and the last to lose its monks in 1992.
The walls were built in the 14th century to protect the town from pirates or invaders. There are walkways and a simple cafeteria along the walls, and a neoclassical church, which was built in 1832.
It is still a popular place of pilgrimage, flanked by two enormous landmarks - to one side a 14m stone cross, to the other a 35m column topped by a statue of Christ holding out his right hand in blessing. The views from the terrace take in Cabrera, Cap de Formentor and several other hilltop sanctuaries dotted across the plain. From the statue of Christ you look out towards the Castell de Santueri, a 14th century rock castle built into the cliffs on the site of a ruined Arab fortress.
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.