Schloss Liebeneck, Manor house in Osterspai, Germany.

Schloss Liebeneck is a stately home in Osterspai featuring a distinctive round tower crowned by a steep hipped roof that dominates its form. The building sits above the village and is accompanied by auxiliary structures and the Grauborn spring on its grounds.

The current building succeeded an earlier structure from 1590 and underwent major reconstruction between 1873 and 1875 under architect Joseph Balthasar Fuchs. This significant renovation marked a turning point in the estate's architectural evolution.

The double portal on the north risalit carries the alliance coat of arms of Preuschen and von Schwartzenau, marking the 1793 transfer of the fief to Georg Ernst Ludwig von Preuschen. The Grauborn spring, enclosed within the grounds, gave the original 1590 house its first name.

The castle is privately owned and can only be viewed from the outside. It stands above the village of Osterspai; the footpath to the Rhine and the trails along the river give views of the building. The interior is not open to visitors.

The name Liebeneck replaced the older name Grauborn, which the estate still bore in a 1610 letter; the spring of that name remains on the grounds. The von Liebenstein family moved here from Burg Liebenstein shortly after 1590 because the new seat was better equipped and lay more centrally in their small, three-part territory.