Schönrain Priory was a house of the Benedictine Order located near Lohr in the Spessart. There is a legend that it was originally founded in the Carolingian period, in about 750, by Saint Lioba, and some have argued that a few traces of architecture from that period survive. However, firm information on this place is available only from the 11th century, when the monastery, with some property to endow it, was given by Counts Ludwig and Beringer of Sangerhausen to Hirsau Abbey, against the background of the Investiture Controversy and the Hirsau Reforms. It was duly re-founded as a priory of Hirsau.
The Vögte (or lay stewards) were the Counts of Rieneck, kin of the founders, who persistently over the next centuries tried to acquire the property for themselves. Eventually, after severe damages sustained during the German Peasants' War, the then Abbot of Hirsau dissolved the monastery at Schönrain and sold the premises to the Rieneck family, who re-built it as a residence.
The site, after a number of descents, passed to the Prince-Bishops of Würzburg, who used it as accommodation for their forestry officials. It was secularised in 1802 and continued in use by the forestry officials of the Kingdom of Bavaria. When their headquarters was moved elsewhere, the buildings at Schönrain were stripped for building materials, and the site has been in ruins since that time.
Since 1973 the site and the ruins have been under the protection of a local environmental and historical preservation group, the Lohrer Heimatfreunde.
Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.