Nydala Abbey was a medieval Cistercian monastery. Nydala (from Swedish ny, meaning new, and dal, meaning valley) was called Sancta Maria de Nova Valle or just Nova Vallis in Latin. It was founded together with Alvastra Abbey in 1147 as the first cistercian monasteries in Sweden. King Gustavus Vasa appropriated the abbey in the 1520s, and the Danes sacked it in 1568. Part of the abbey church was rebuilt in the following years, and is still used as parish church. Some other ruins also remain visible at the site.
References:Ehrenbreitstein Fortress was built as the backbone of the regional fortification system, Festung Koblenz, by Prussia between 1817 and 1832 and guarded the middle Rhine region, an area that had been invaded by French troops repeatedly before. The fortress was never attacked.
Early fortifications at the site can be dated back to about 1000 BC. At about AD 1000 Ehrenbert erected a castle. The Archbishops of Trier expanded it with a supporting castle Burg Helferstein and guarded the Holy Tunic in it from 1657 to 1794. Successive Archbishops used the castle's strategic importance to barter between contending powers; thus in 1672 at the outset of war between France and Germany the Archbishop refused requests both from the envoys of Louis XIV and from Brandenburg's Ambassador, Christoph Caspar von Blumenthal, to permit the passage of troops across the Rhine.