Helsinki is the capital and most populous city of Finland. Located on the shore of the Gulf of Finland, it is the seat of the region of Uusimaa in southern Finland, and has a population of. The city's urban area has a population of, making it by far the most populous urban area in Finland as well as the country's most important center for politics, education, finance, culture, and research. Helsinki is located 80 km north of Tallinn, Estonia, 400 km east of Stockholm, Sweden, and 300 km west of Saint Petersburg, Russia. It has close historical ties with these three cities.