The Castle can be visited
Marchegg Castle

In the town of Marchegg, Lower Austria, is Marchegg Castle, a Baroque castle. Originally built as a fortified town castle on the Hungarian border, it now serves as a cultural attraction.
History+
The castle's origins date back to the 13th century, when a town castle was built after the Battle of Groißenbrunn to protect against Hungary. First documented in 1346, the complex experienced numerous destructions and reconstructions. During the Hussite Wars in the 15th century and the First Turkish Siege, the castle was severely damaged. In the 16th century, it came into the possession of the Counts of Salm, who made it habitable again. Devastated again by Hungarian rebels at the beginning of the 17th century, Count Paul Pálffy of Erdöd acquired the castle, first as a pledge, then as property. He had the old castle demolished, except for one tower, and rebuilt as a square moated castle according to plans by Lambert Lambion. Around 1715, a Baroque renovation was carried out by master builder Christian Alexander Oedtl on behalf of Nikolaus V. Pálffy, during which the moat was filled in and the south front received its current appearance.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Marchegg_2111.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 48.2817, 16.9067