Toruń is a historical city on the Vistula River in north-central Poland, and a UNESCO World Heritage Site. Its population was 202,074, as of December 2018. Previously, it was the capital of the Toruń Voivodeship (1975–1998) and the Pomeranian Voivodeship (1921–1945). Since 1999, Toruń has been a seat of the self-government of the Kuyavian-Pomeranian Voivodeship and, as such, is one of its two capitals, together with Bydgoszcz. The cities and neighboring counties form the Bydgoszcz–Toruń twin city metropolitan area.