Schlaining Castle, near the town of Oberwart, is located at a formerly strategically important point at the intersection of several trade routes connecting Steinamanger (HU), Graz, Wiener Neustadt and Ödenburg. Schlaining Castle was first mentioned in 1271 as "castrum Zloynuk". At that time it was owned by the Counts of Güssing. In the 15^th century, Andreas Baumkircher acquired the fortress. Many legends surround his name in the region still today, especially in connection with the so-called "Baumkircher feud" (1469-1471) against Emperor Frederick III, which finally led to Baumkircher's execution in Graz. In the mid 16^th century, the castle came into the possession of the Batthyány family.

Since 1980, the castle has belonged to the Federal State of Burgenland and is run as a museum.  It also offers several seminar and conference rooms. In 1983, the "Austrian Study Center for Peace and Conflict Resolution (ASPR)" was established in Burg Schlaining. The ASPR sees itself as a place of respectful encounter where people can learn together.