Spas in Budapest of these are still in use to this day. Budapest gained its reputation as a city of spas in the 1920s, following the first realization of the economic potential of the thermal waters in drawing in visitors. Indeed, in 1934 Budapest was officially ranked as a "City of Spas". Construction of the Király Baths started in 1565, and most of the present-day building dates from the Turkish period, including most notably the fine cupola-topped pool. The Rudas Baths are centrally placed – in the narrow strip of land between Gellért Hill and the River Danube – and also an outstanding
Budapest the city. Other important sectors include also, as natural science research, information technology and medical research, non-profit institutions, and universities. The leading business schools and universities in Budapest, the Budapest Business School, the CEU Business School and Corvinus University of Budapest offers a whole range of courses in economics, finance and management in English, French, German and Hungarian. The unemployment rate is far the lowest in Budapest within Hungary, it was 2.7%, besides the many thousands of employed foreign citizens. Budapest is among the 25 most visited cities in the world, the city welcoming more than 4.4 million international visitors