Bucharest is the capital and largest city of Romania. It is described as the cultural, financial, entertainment, and media centre in the country with a significant influence in Eastern Europe as well. In geopolitical regards, Bucharest has been and still is an important capital of a state situated in Central and Eastern Europe, where noteworthy summits had taken place (for example the 2008 Bucharest summit). It is also a city with a significant influence in terms of education, tourism, research, technology, health care, art, fashion, sports, and politics. Bucharest is a major economic center in Romania, with a diverse and growing economy that includes industries such as IT, finance, and manufacturing. The city has also seen significant investment in infrastructure, with new roads, bridges, and public transportation systems being built to improve connectivity and mobility. It is located in the south-east of Romania, on the banks of the Dâmbovița river, less than 60 km north of the Danube River and the border with Bulgaria. It is also one of the most populated cities of the European Union (EU) within city limits and the most populated capital in Eastern Europe. It was the capital of Wallachia from 1659 to 1859 and the capital of the United Principalities of Moldavia and Wallachia (Romanian United Principalities, later the Kingdom of Romania) from 1859 to 1881.