The castle was founded in the 10th century by Odo I, Count of Blois.
Mieszko I, after winning the 972 Battle of Cedynia against the Saxon margrave Odo I, had annexed to the early Polish state the territory on which later the town was founded.
The West Slavic Polans had established a state east of the Saxon marches and, aiming to advance into the Pomeranian lands north of the Warta river, had reached an agreement with late Margrave Gero and Emperor Otto I: Mieszko's ducal title was confirmed and the Polans paid a recurring tribute to the emperor, which was collected by Margrave Odo.
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The margrave, intending to compel Mieszko to pay tribute for the Pomeranian territory between the Oder and Warta rivers, invaded that region.
Odo the Great | Odo II of Champlitte | Odo II, Count of Blois | Odo, Earl of Kent | Odo of Cluny | Odo I, Margrave of the Saxon Ostmark | Odo I, Count of Blois | Odo I | Odo | Odo II |