Śląski Związek Gmin i Powiatów is the association founded in 1991.
According to PR-model, silesia.org.pl is ranked 466,241st in multilingual Wikipedia, in particular this website is ranked 13,490th in Polish Wikipedia.
The website is placed before mhahome.org and after matadortrips.com in the BestRef global ranking of the most important sources of Wikipedia.