Question: The Ekstraklasa team located in the twelfth-largest city in Poland was founded when ?

text: Ekstraklasa
Clubs
There are 16 clubs in the Ekstraklasa . During the course of the season each club plays the others twice , once at their home stadium and once at that of their opponents , for a total of 30 games ( 240 games in the season ) . From the 2013–14 season onward after 30th round league will be split into 'champion ' ( top eight teams ) and 'relegation ' ( bottom eight teams ) groups . Each team plays seven more games ( teams ranked 1–4 and 9–12 play four times at home ) . The 2016–17 season was last when teams started an extra round with half the points ( rounded up ) achieved during the first phase of 30 matches . The changes extend the season to total of 296 matches played . [ 3 ] ArkaCracoviaGórnikJagielloniaKoronaLechLechiaLegiaŁKSPiastPogońRakówŚląskWisła K.Wisła P.Zagłębie L. Location of teams in 2019–20 Ekstraklasa
The Ekstraklasa (Polish pronunciation: [ˌɛkstraˈklasa]), named PKO BP Ekstraklasa since the 2019-20 season due to its sponsorship by PKO Bank Polski, is the top Polish professional league for men's association football teams. Contested by 16 clubs, operating a system of promotion and relegation with the I liga, seasons start in July, and end in May or June the following year. Teams play a total of 37 games each, totalling 296 matches in the season. Games are played on Fridays, Saturdays, Sundays and Mondays. The winner of the Ekstraklasa qualifies for the Polish SuperCup. The Ekstraklasa is now operated by the Ekstraklasa SA (English: Ekstraklasa Joint-stock company). The Ekstraklasa (former I liga) was officially formed as Liga Polska on 4-5 December 1926 in Warsaw, since 1 March 1927 as Liga Piłki Nożnej (Polish pronunciation: [ˈlʲiɡa ˈpiwki ˈnɔʐnɛj]), but the Polish Football Association (Polish: Polski Związek Piłki Nożnej, PZPN) had been in existence since 20 December 1919, a year after the independence of Poland in 1918. The first games of the freshly created league took place on 3 April 1927, while first national non-league football championship took place in 1920. A total of 81 teams have played in the top division of Polish football since the founding of the league, of which 16 clubs have won the title. The current champions are Piast Gliwice, who won their first-ever title in 2018-19 season.
Team Location Venue Capacity
Arka Gdynia Gdynia Stadion Miejski 15,139
Cracovia Kraków Stadion Cracovii 15,016
Górnik Zabrze Zabrze Stadion im . Ernesta Pohla 24,413
Jagiellonia Białystok Białystok Stadion Miejski 22,432
Korona Kielce Kielce Kolporter Arena 15,550
Lech Poznań Poznań Stadion Miejski 43,269
Lechia Gdańsk Gdańsk Stadion Energa Gdańsk 43,615
Legia Warsaw Warsaw Stadion im . Marszałka Józefa Piłsudskiego 31,800
ŁKS Łódź Łódź Stadion ŁKS 5,700
Piast Gliwice Gliwice Stadion Miejski 10,037
Pogoń Szczecin Szczecin Stadion im . Floriana Krygiera 18,027
Raków Częstochowa Częstochowa Miejski Stadion Piłkarski Raków 4,200
Śląsk Wrocław Wrocław Stadion Miejski 42,771
Wisła Kraków Kraków Stadion im . Henryka Reymana 33,326
Wisła Płock Płock Stadion im . Kazimierza Górskiego 12,800
Zagłębie Lubin Lubin Stadion KGHM Zagłębia 16,068
Zagłębie Sosnowiec Sosnowiec Stadion Ludowy 7,500 ( 4,900 seats )