The Esterházy Palace As a former princely residence, it is a landmark of the Burgenland state capital Eisenstadt. It is owned by the Esterházy Private Foundation.
The castle's historic ballroom is known as the Haydn Hall and is often used as a concert hall. Joseph Haydn served as Kapellmeister to the princely court for thirty years in the 18th century and in this role had to compose hundreds of pieces of music for immediate performance at the prince's official events. In 2009, two exhibitions were dedicated to Haydn in the castle.
The flower and kitchen garden to the east and north of the castle was given a baroque makeover in the 18th century and, after purchasing additional land at the beginning of the 19th century, was transformed into a spacious English landscape park by Moreau as part of the castle renovation. The park is one of the most important garden architectural monuments in Austria and is a listed building.