The remains of the Castle can be visited
Senftenberg Castle

The Senftenberg Castle Ruin, first documented in 1197, is located on a hill in the market town of the same name in northern Lower Austria.
History+
The first documented mention of the castle and its lords, the family of Senftenberg, dates back to April 26, 1197, when a Rudegerus de Senftenberc was named as a witness. Originally built as a hilltop castle by the Lengenbach family, who also owned castles in Rehberg, it later passed to relatives who adopted the names Senftenberg and Minnenbach. In the 13th century, the castle was owned by the Zebringers, and in the 14th and 15th centuries, it belonged to the Wallseers. Between 1407 and 1409, the complex suffered partial damage during the Guardianship Feuds but was subsequently repaired. During the first Siege of Vienna by the Turks, it served as a refuge for the local population. Around 1520, highwaymen used the castle as a hideout.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.panoramio.com/photo/101523023
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 48.4476, 15.5650