Football is the most popular sport in Poland. Over 400,000 Poles play football regularly, with millions more playing occasionally. The first professional clubs were founded in the early 1900s, and the Poland national football team played its first international match in 1921. There are hundreds of professional and amateur football teams in Poland; which are under the auspices of the national 1st league, 2nd level, 3rd level, 4 parallel divisions of 4th level, 20 regional parallel divisions of 5th level and a variety of other lower-level leagues. Additionally, there are the Polish Cup and Polish Supercup competitions. The history of football in Poland started in the late 19th century with the rising popularity of the new sport. At the time, the Polish state was partitioned. The first decades of Polish football are therefore connected with the history of Football in Austria and the Austrian Football Association, which was founded in 1904. The first Polish football clubs were Lechia Lwów (1903), Czarni Lwów (1903), Pogoń Lwów (1904), KS Cracovia (1906) and Wisła Kraków (1906). The Polish national federation, called the Polish Football Union (Polski Związek Piłki Nożnej, PZPN), was founded on 20 December 1919, in Kraków when 31 delegates elected Edward Cetnarowski as the first president. The PZPN joined FIFA in 1923 and UEFA in 1955. In a similar fashion to other European states, football appeared in Poland in the late 19th century. In 1888 Prof. Henryk Jordan, a court physician of the Habsburgs and the pioneer of sports in Poland, opened a sports park in Kraków's Błonia, a large open space surrounding the demolished city walls of that town. The park, along with the Sokół society founded in 1867, became the main centres to promote sports and healthy living in Poland. It was Jordan who began promoting football as a healthy sport in the open air; some sources also credit him with bringing the first football to Poland from his travels to Brunswick in 1890. Other sources mention Dr.