Jordan was the first Bishop of Poland from 968 with his see, most probably, in Poznań. A foreigner, he is considered a saint in the Reformed Catholic Church in Poland.
Epitaph of Jordan in Archcathedral Basilica of St. Peter and St. Paul in Poznań
Mieszko I was Duke of Poland from 960 until his death in 992 and the founder of the first unified Polish state, the Civitas Schinesghe. A member of the Piast dynasty, he was the first Christian ruler
Ostrów Lednicki, ruins of palatium and chapel
Wichmann the Younger Surrenders to the Polish Prince Mieszko by Franciszek Smuglewicz (early 19th century)
Emperor Otto II, from Registrum Gregorii, c. 983