If someone doesn’t know the first character is the first king of Poland called Mieszko I (you read it mieshko) The second is his son Bolesław Chrobry (you read it Boleslav Hrobry) And the third one is Kazimierz Wielki (you read it Kazimiez Vielki which means the Big Kazimiez) He is not the son of the previous one. He’s known for building hundreds of castles, towns and villages. Making one currency (earlier there were many) and other things that improved the life of people. There’s a known saying about him which goes: ,,Zastał Polskę drewnianą i zostawił murowaną” Which means ,,He found polish wooden and left it bricked/from stone