Mrągowo [mrɔŋˈɡɔvɔ] (until 1947 Polish: Ządźbork [ˈʐɔɲd͡ʑbɔrk]; German: Sensburg ) is a resort town in the Warmian-Masurian Voivodeship of northeastern Poland, with 21,889 inhabitants (2019). It is the capital of Mrągowo County and the seat (though not part of) the Gmina Mrągowo. The town is located in the historical region of Masuria, within the Masurian Lake District, about 60 km (37 mi) east of Olsztyn.
Read more on wikipedia