https://en.wikipedia.org/wiki/Kaziuko_mug%C4%97

West Poland is Lithuanian!?

http://muzeumochla.pl/2019/02/19/kaziuki-2/



In recent years the fair has expanded into other cities in Lithuania, including Kaunas (in Laisvės alėja and Town Hall Square), Alytus, Klaipėda.[1] Similar festivals called Kaziuki are also held in several cities in Poland, e.g. in Lidzbark Warmiński, Olsztyn,[5] Szczecin, Gdańsk and Poznań,[6][7][8