Eisenstadt (ˈaɪzn̩ʃtat; Eisnstod; Kismarton; Željezni grad or Željezno; Železno) is the capital city of the Austrian state of Burgenland. With a population of 15,074 (as of 2023), it is the smallest state capital and the 38th-largest city in Austria overall. It lies at the foot of the Leitha Mountains hill range. From 1648 to 1921, Kismarton/Eisenstadt was part of the Habsburg Empire's Kingdom of Hungary and the seat of the Hungarian noble family Eszterházy. During this time, the composer Joseph Haydn lived and worked in Eisenstadt as a court musician under the patronage of the Esterházy family. After the cessation of Burgenland to Austria in 1921, the city became the province's capital in 1925. As the state capital of Burgenland, it functions as a center of public administration and services and is the seat of three institutes of higher education. Eisenstadt lies on a plain leading down to the river Wulka, at the southern foot of the Leitha Mountains, about from the Hungarian border. Eisenstadt is divided into three districts (Ortsteile): Eisenstadt-Stadt (Eisenstadt proper) Kleinhöflein im Burgenland (Kishöflány; Mala Holovajna) – a town that lies to the west of Eisenstadt proper St. Georgen am Leithagebirge (Lajtaszentgyörgy; Svetojurje) – a town that lies to the east of Eisenstadt proper Furthermore, Eisenstadt is divided into five Katastralgemeinden: Eisenstadt-Stadt Oberberg, or Oberberg-Eisenstadt (Felsőkismartonhegy; Željezno Brig) – the northern area of Eisenstadt starting beyond the Jewish quarter Unterberg, or Unterberg-Eisenstadt (Alsókismartonhegy; Željezno Donji Brig) – the southern area of Eisenstadt starting beyond the Kalvarienbergplatz & the Ruster Straße and including the Jewish quarter Kleinhöflein im Burgenland St. Georgen am Leithagebirge Other informal areas of the city include Wiesäcker and Lobäcker, which lie south of the Eisbach, a tributary of the Wulka. The city is surrounded by the district (Bezirk) of Eisenstadt-Umgebung.