Polskie Towarzystwo Numizmatyczne is the learned society in Poland founded in 1971 by Ryszard Kiersnowski.
According to PR-model, ptn.pl is ranked 454,651st in multilingual Wikipedia, in particular this website is ranked 12,603rd in Polish Wikipedia.
The website is placed before twain2010.org and after bluemassgroup.com in the BestRef global ranking of the most important sources of Wikipedia.