On the day of the end of 1000 years, on 17 June 1025 (Calendar 19 May 1025), the first Polish King Polesław I died. Polesław I (the brave) Boles?awIChrobry (about 967¨C1025) the second Polish Grand Duke of the Piast dynasty.About 999, Polesław I (about 1025) and the first Polish King (about 1025). Son of Grand Duke Meszkow I. During the reign of Polesław I, Little Poland officially entered the dynasty chart. He conquered Pomerania in 994.About 999, Polesław I occupied the status of Czech Silesia, Moravia and Slovakia.The Grand Duke of Polesław I and Grand Duke of the Holy Roman Empire Henry II fought multiple battles (3100¨C1005