Mieszko I w Wikipedii po Polsku

Mieszko I on Wikipedia in English

Mieszko I was a Duke of the Polans from about 960 until his death. He was father of Bolesław I the Brave, the first crowned King of Poland; father of Świętosława (Sigrid), a Nordic Queen; and grandfather of her son, Cnut the Great. The first historical ruler of Poland, Mieszko I is considered the de facto creator of the Polish state. He continued the policy of his father and grandfather, who were rulers of the pagan tribes located in the area of present Greater Poland. Either through alliances or by use of military force, Mieszko extended the ongoing conquests and early in his reign subordinated Kuyavia, Gdańsk Pomerania and Masovia. For most of his reign, he was involved in warfare for the control of Western Pomerania, eventually conquering it up to the vicinity of the lower Odra River. During the last years of his life he fought the Bohemian state, winning Silesia and probably Lesser Poland.