The remains of the Castle can be visited
CastleBendorf - Sayn
Sayn Castle
In Bendorf-Sayn, the Sayn Castle Ruin, a spur castle built in the 12th century, stands on a ridge. Once the ancestral seat of the Counts of Sayn and later Sayn-Wittgenstein, the complex gives insight into medieval architecture and history.
History+
The Counts of Sayn, first documented in the 10th century, initially resided in the Old Castle. Between 1139 and 1150, Heinrich I and Eberhard I of Sayn acquired the County of Bonn, leading to conflicts with the Archbishopric of Cologne and the partial destruction of their castle in 1152. Immediately thereafter, construction of the new Sayn Castle began on the western spur of the Kehrberg. Count Heinrich III the Great ruled from here in the 13th century over an extensive county. After his childless death in 1247, the castle passed to Johann I of Sponheim, whose descendants adopted the name Sayn. In 1345, the County of Wittgenstein was added through marriage, and the line was called Sayn-Wittgenstein from 1361.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=612
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: 50.4390, 7.5798