Budapest later, with the help of the Russian Empire. 1867 was the year of Reconciliation that brought about the birth of Austria-Hungary. This made Budapest the twin capital of a dual monarchy. It was this compromise which opened the second great phase of development in the history of Budapest, lasting until World War I. In 1849 the Chain Bridge linking Buda with Pest was opened as the first permanent bridge across the Danube and in 1873 Buda and Pest were officially merged with the third part, Óbuda (Old Buda), thus creating the new metropolis of Budapest. The dynamic Pest grew into
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