Fischau Castle, Medieval castle in Bad Fischau-Brunn, Austria

Fischau Castle is a multi-building complex located on Wiener Neustadterstrasse in Bad Fischau-Brunn that functions as a museum today. The estate consists of several connected structures arranged around the main castle, with interior spaces dedicated to exhibitions and visitor exploration.

The castle's predecessor was a small fortified house from the mid-12th century held by the Starhemberg family; the Teuffenbachs owned it in the 13th and 14th centuries. Emperor Ferdinand I pledged it to the Counts of Heussenstein in 1561, and they bought it in 1577, keeping it until 1817. A major rebuilding took place in 1728, and Archduke Rainer gave the estate its present form in 1830.

The castle houses the Forum Bad Fischau cultural association, which runs concerts and exhibitions and hosts the Blaugelbe Viertelsgalerie Industrieviertel. Its concert series, the "Fischauer Klangbogen", takes place both inside the castle and in the sculpture park laid out in the castle grounds.

The castle is easily accessible in Bad Fischau-Brunn along a main street that makes reaching it straightforward. Visitors should check ahead about exhibition times, as opening hours can vary depending on the season and special events.

The Berghof across Wiener Neustädter Straße was once a Lesehof, a wine-collection farm of Neuberg Abbey, and is protected together with the castle and its former farm buildings. The Heussenstein counts held Fischau from 1577 to 1817; Alexandrine von Heussenstamm died in Bad Fischau in 1930.