师昊虔
2021-07-27
KonradIofMasovia(Polish:KonradIMazowiecki)(ca.1187/88–31August1247),fromthePolishPiastdynasty,wasthesixthDukeofMasoviafrom1194untilhisdeathaswellasHighDukeofPolandfrom1229to1232andagainfrom1241to1243.
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