Rothmühle, Medieval mill and château in Schwechat, Austria

The Rothmühle is a two-storey baroque château in Rannersdorf, part of Schwechat, built in the second half of the 17th century on a medieval core. Its U-shaped plan opens eastward, the west front is angled, and two polygonal defensive towers with onion domes flank the round-arched portal, reached over a balustraded bridge. Inside are a ballroom with stucco ceiling and two ceiling paintings, a chapel, and halls named after Schrödl, Mozart and Nestroy.

Rothmühle was first documented around 1300 as a mill, later used as a cloth factory, leather factory and workers' quarters. In 1683 it was devastated during the Turkish invasion; the moat was filled in and the castle rebuilt. The city of Schwechat bought the building on 28 April 1967 and restored it by 1972, with a further renovation in 2001.

The building has hosted annual Nestroy theater performances since 1973, attracting audiences from across the region. These events have made it a gathering place for regional performing arts.

The location is accessible as a bed and breakfast and event venue in Schwechat. Check ahead to see which areas are open to visitors and whether events are currently scheduled.

The Mozart Hall is named after Wolfgang Amadeus Mozart, who visited the Rothmühle on 22 September 1773. The room is one of several named halls in the building, alongside the Schrödlsaal and the Nestroysaal.