'''Warsaw''', officially the '''Capital City of Warsaw''', is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland and its population is officially estimated at 1.8 million residents within a greater metropolitan area of 3.1 million residents, which makes Warsaw the 7th most-populous capital city in the European Union. The city area measures  and comprises 18 boroughs, while the metropolitan area covers . Warsaw is an alpha- global city, a major cultural, political and economic hub, and the country's seat of government. Its historical Old Town was designated a UNESCO World Heritage Site.