Jun 04 Duke Przemysl I of Poland in the year 1257.
Jun 05 Kraków, Poland receive city rights in the year 1257.
Oct 14 In the year 1257 birth of king Przemysl II of Poland (d. 1296)
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Jun 04 Duke Przemysl I of Poland died in the year 1257.
Dec 24 John I, Count of Hainaut (b. 1218) died in the year 1257.
Important Dates And Events In History - Hisdates.Com