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This study analyses narrative and diplomatic sources which provide an account of the changeable relationships of the Wroclaw Duke Henryk IV Probus towards the Przemyslid Dynasty. Written resources do not, however, always allow for an unambiguous interpretation and many questions still remain unanswered. Yet, based on research carried out thus far, it is possible to state that the Duke's relationship towards the last Przemyslids oscillated between vassalage, alliance and rivalry. This changeability was the result, firstly, of the Duke coming into contact with different personalities of the Przemyslid Dynasty, and also followed from the wider historical context which in the final third of the 13th century was marked by a strengthening of the Hapsburgs' influence upon events in Central Europe.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.