Around the year 1000, Poland is ruled by the Piast dynasty. Duke Mieszko I, first known ruler of Poland, is baptised in 966 and marries the Czech Princess Dobrawa. This baptism marks the entry of Poland into Christian Europe. In 1000, searching a strong partner for renovation of the federative Holy Roman Empire, the Emperor Otto III went to Gniezno and met the Polish duke Boleslaus called ‘the Brave’, who successfully demonstrated wealth of the country and strength of its ruler. Gniezno was confirmed as an archidiocese for the Polish territory.