Schloss Seebarn, Heritage castle in Harmannsdorf, Austria.

Schloss Seebarn is a two-winged structure with fieldstone walls that forms a complete noble estate near Vienna. The ensemble includes several connected buildings and courtyards that combine agricultural and residential functions.

The estate was built in the second half of the 17th century and underwent major redesign around 1740. A century later, architect Carl Gangolf Kayser oversaw further modernization of the complex.

The estate has belonged to the descendants of the Counts of Wilczek since the 18th century and is still run as a working farm (Gutsbetrieb) by the family today. The name Seebarn refers to the historic estate, not to the separate Schloss Seebarn am Wagram.

The site sits on Schloßstraße 1 and can be viewed from outside year-round without entering the privately operated estate. The best views of the buildings come from the surrounding paths and the front grounds.

The estate has belonged to the descendants of the Counts of Wilczek down to the present day. It is also not the same place as Schloss Seebarn am Wagram, a similarly named castle in Lower Austria, so visitors should not confuse the two.