the first document indicating her death is from 3 May 1257. As far as the day and month, Nekrolog strzeleński reported that she died on 21 February, but...

Premislaus or in Polish as Przemysław; 14 October 1257 – 8 February 1296) was the Duke of Poznań from 1257–1279, of Greater Poland from 1279 to 1296, of Kraków...