Schloß Gleina, Cultural heritage monument in Gleina, Germany.

Schloss Gleina is a two-storey Baroque building with a horseshoe-shaped plan and a large mansard roof, built between 1689 and 1739 for Hans Dietrich von Geißmar, probably to designs by the Leipzig engineer Dörffler. A passage through the central section links the courtyard to the landscape park east of the house, where fragments of Baroque sculptures and an iron gate with vase finials survive. Inside, Rococo stuccowork decorates the dining room on the ground floor and the salon with anteroom upstairs, as well as several other rooms; the upper-floor library has a timber-beam ceiling and panelled walls.

Built between 1689 and 1739 by Master Hunter Hans Dietrich von Geißmar, it later served as a residence for the Helldorf family until 1945. After World War II, the building went through several different uses before eventually returning to cultural purposes.

The hall names come from the Helldorf era: the Red Hall was the piano room, the Blue Hall the family dining room, and the Yellow Hall hosted celebrations and the hunting party's meals. Since 2013 the owner has called the castle a "social sculpture" in the spirit of Joseph Beuys, open to anyone realising cultural projects; the Kulturverein Schloss Gleina, founded in 2018, organises several events a year and a large art biennale every two years.

The courtyard and landscape park connect through a passage in the central section of the building, so visitors can walk from one to the other. The park lies east of the house and its gate is a wrought-iron grille flanked by vase finials. The cultural association Schloss Gleina, founded in 2018, holds several events a year and a large art biennale every two years.

In the post-war period, it housed a nursing home with over 50 residents and was once used as a Soviet military command post. These different chapters in the building's life show how it has repeatedly adapted to new purposes.