Toruń is a city with a population of around 200,000 about 200 km north-west of Warsaw. It is widely considered one of the most beautiful cities in Poland. Its medieval quarter is inscribed on the UNESCO Cultural Heritage List. Its pride and joy are its townhouses, which date from various eras, and in particular its Gothic monuments, such as the Cathedral of St John, the Church of the Assumption, the monumental town hall, and the remains of the medieval defensive walls.
Toruń is also famous as the birthplace of the astronomer Nicolaus Copernicus (Pol.: Mikołaj Kopernik), the creator of the heliocentric theory. The house in which he was born is now home to a museum devoted to the great astronomer.