Nellenburg Castle

Nellenburg was first documented in 1056, but its existence in the 10th century is already evidenced by a Gottfridus de Nellenburg in 958. The Counts of Nellenburg had their seat here since the mid-10th century. Eberhard, Count of Nellenburg, a relative of Emperors Conrad II and Henry III, founded the Benedictine monastery of All Saints in Schaffhausen in 1049. Around 1050, the family shifted its center of power to the High Rhine to protect the monastery and the castle. During the Investiture Controversy, the castle passed to his nephew Count Dietrich in 1105. Through marriage, the Landgraviate of Nellenburg came into the possession of the Counts of Veringen in 1170. In 1291, Duke Albrecht of Austria besieged the castle, causing the main tower to collapse due to undermining. In 1422, Nellenburg passed to the Lords of Tengen, who sold it to Archduke Sigismund of Austria in 1465.