Budapest (pron.: /ˈbuːdəpɛst/, /ˈbuːdəpɛʃt/ or /ˈbʊdəpɛst/; Hungarian pronunciation: [ˈbudɒpɛʃt] ( listen); names in other languages) is the capital and the largest city of Hungary, the largest in East-Central Europe and the seventh largest in the European Union. It is the country's principal political, cultural, commercial, industrial, and transportation centre, sometimes described as the primate city of Hungary. In 2011, according to the census, Budapest had 1.74 million inhabitants, down from its 1989 peak of 2.1 million due to suburbanization. The Budapest Commuter Area is home to 3.3 million people. The city covers an area of 525 square kilometres (202.7 sq mi) within the city limits. Budapest became a single city occupying both banks of the river Danube with a unification on 17 November 1873 of west-bank Buda and Óbuda with east-bank Pest.
Buda Castle (Hungarian: Budavári Palota, German: Burgpalast, Turkish: Budin Kalesi) is the historical castle and palace complex of the Hungarian kings in Budapest, first completed in 1265. In the past, it was also called Royal Palace (Hungarian: Királyi-palota) and Royal Castle (Hungarian: Királyi Vár, German: Königliche Burg).
Buda Castle was built on the southern tip of Castle Hill, bounded on the north by what is known as the Castle District (Várnegyed), famous for its Medieval, Baroque, and 19th-century houses, churches, and public buildings. It is linked to Clark Ádám Square and the Széchenyi Chain Bridge by the Castle Hill Funicular.