Przemysl II had begun to claim his…

Przemysl II had begun to claim his own separated Duchy in 1273, after the victorious expedition against Brandenburg.

Boleslaw V, unable to faced the powerful pressure, had agreed to this and given his nephew the district of Poznań.

To bind Przemysl II with his politics, Boleslaw had arranged the marriage of his nephew with Ludgarda, daughter of Henry I the Pilgrim, Lord of Mecklenburg.

In addition, Ludgarda is a granddaughter of Duke Barnim I of Pomerania, and thanks to this union the alliance with Western Pomerania is reinforced.

However, Przemysł II had soon become involved with Henry IV Probus, and Boleslaw, using the imprisonment of Henry IV in 1277, had tried to force financial concessions, supporting this policy with the marriage of his firstborn daughter Elisabeth with Henry V the Fat, Duke of Legnica.

Boleslaw dies on April 14, 1279, in Kalisz and is buried in the Archcathedral Basilica of St. Peter and St. Paul in Poznań.