Lahneck Castle was built in 1226 by the Archbishop of Mainz Siegfried III of Eppstein to protect his territory at the mouth of the Lahn, where the town of Oberlahnstein and a silver mine had come into the possession of the Archbishopric in 1220. The castle chapel, dedicated to Saint Ulrich of Augsburg, was built in 1245, in the same year the first Burggraf took up residence in the castle.
In 1298, King Adolf of Nassau was a guest at the castle, shortly before his death in the Battle of Göllheim against King Albert I of Habsburg. In order to avenge him, the Burggraf of Lahneck, Friedrich Schilling of Lahnstein, participated in a conspiracy against Albert. The castle was stormed in 1309 and Friedrich Schilling was executed.
According to legend, when the Knights Templar were ordered by Pope Clement V to disband in 1312, the last 12 Templars took refuge in the castle, where they perished in a heroic fight to the death with forces of Mainz Archbishop Peter of Aspelt. In 1332, Pope John XXII granted a 40-day indulgence to those attending services in the castle chapel.
In 1475, Mainz Archbishop Theodoric of Isenburg-Büdingen had the castle strengthened with two outer walls following the Mainz Bishops Feud with his rival archbishop, Adolph II of Nassau. In 1633, during the Thirty Years War, the castle was heavily damaged by Swedish and Imperial troops.
On July 18, 1774, Johann Wolfgang von Goethe wrote the poem Geistesgruß. It was inspired by the sight of Lahneck Castle during his travels along the Lahn River.
In the German Mediatisation of 1803, in which the Archbishopric of Mainz lost its secular territories, Lahneck Castle was granted to the Duchy of Nassau. In 1850 it was sold and has remained in private ownership since. Edward Moriarty, a Director of the Rhenish Railway Company, became one of its first owners. During the ownership of Earl Kleist-Tychow a more than life-sized portrait of Queen Victoria was presented which can still be seen at the castle. Imperial Admiral Robert Mischke, later commander of armoured cruiser 'von der Tann', purchased the castle in 1909 and it has been owned by his family ever since.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.