The Rynek Underground museum of Kraków is situated below the market square of the city. The museum is approximately 4000 square meters in size. Work on the museum first began in 2009 with a budget of 38 million złotys, equal to approximately 9.3 million United States dollars. The museum was opened on September 24, 2010. The main exhibit "In the Footsteps of Krakow's European Identity" was launched three days after the museum's opening, on September 27, 2010.