Mieszko I (c. 935 – May 25, 992) was a duke of the Polans and the first christian ruler of Poland. He was father of Boleslaw I, first polish king. His politican masterpiece called ,The Baptism of Poland" caused, that germans,bohemians and vielets didn't anymore attacked Poland, beacause he got a baptism from the bishop from the Bohemia, which was a german Fiefdom.