Favorite thing: I really liked the laid back atmosphere. The single most important thing to do is a concert in the Haydn hall in the Esterhazy castle. That way, you also get to see the castle from the inside and can enjoy a nice glass of local wine in the intermission.
Favorite thing: The Esterházy family vault is in the Franciscan church (built 1625-30). The family originated in south-western Slovakia in the Middle Ages (part of the Kingdom of Hungary at that time) and rose to prominence in the 17th century. The family became immensely wealthy and the Esterházys were the largest landowners in the Hapsburg Empire (in today’s Austria, Slovakia and Hungary). There are several branches of the family. The most famous is probably the Eisenstadt-Esterházys. The head of the family had the noble title of Prince, until all noble titles were abolished in Hungary in 1947. About the same time the family lost all its lands except in Austria. Hayden’s patrons were Prince Pál Antal (1711-1762), who employed him, and Prince Nikolaus Esterházy (1714-1790), sometimes called "the Magnificent".
The Mount Calvary Church (Kalvarienbergkirche) was built between 1701 and 1709. In the Mount Calvary Church is the tomb of the great classical composer Joseph Haydn (1732-1809). Haydn, an Austrian, was employed with the Esterházy family as a court musician for more than 40 years. After his death he was first buried in Vienna, but later his remains were transferred to this church in Eisenstadt. - The house where Haydn lived from 1766 to 1790 is now a museum. So is his Summer Hut and Herb Gardens just outside the old city walls (guided tours).
See the former palace of the Esterházy princes (Schloss Esterházy), which was originally built in the14th century and rebuilt extensively 1663-72. The palace is open to visitors, but may be visited only as part of a guided tour. There are exhibitions (treasures belonging to the Esterházy family) and Haydn concerts (works by other composers too) to be enjoyed every week between April and October, and the high point of the concert season is The Haydn Festival which takes place in September every year. The music of Haydn (masses) is also performed in the Mount Calvary Church where Haydn is buried.