Mieszko I of Poland
Mieszko was a great politican, an example of his politician and strategist genius was the fact, that he adopted christianity from the Bishop from Bohemia, which was a german fiefdom, and he stopped most of the attacks of Vielets, Bohemians and Germans. He was also a big friend of the Holy Roman Empire's Emperor. He conquered almost all of the terrains of today's Poland and he United all of the Polish tribes in one country, with the capital in Gniezno.