Budapest (pronounced /ˈbuːdəpɛst/, also /ˈbʊdəpɛst/, /ˈbjuːdəpɛst/ or /ˈbuːdəpɛʃt/) is the capital of Hungary. As the largest city of Hungary, it serves as the country's principal political, cultural, commercial, industrial, and transportation centre. In 2010, Budapest had 1,721,556 inhabitants, down from 1980 peak of 2.06 million. The Budapest Commuter Area is home to 3,271,110 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 right (west)-bank Buda and Óbudawith left (east)-bank Pest.