What type of details about bogusaw radziwi can be gathered from the following bio? Bio: bogusaw radziwi -lrb- ; ; 3 may 1620 -- 31 december 1669 -rrb- was a polish princely magnate and a member of the polish-lithuanian '' szlachta '' , or nobility . he was of the radziwi magnate family . by birth he was an imperial prince of the holy roman empire . a descendant of the famous knight zawisza czarny , duke konstanty ostrogski . born of the mightiest and highest resident family of the grand duchy of lithuania -lrb- as well as a blood descendant of king casimir iv of poland , and kestutis and vytautas , monarchs of lithuania -rrb- , radziwi was the owner of birzai , dubingiai , suck , and kopyta , the great standard-bearer of lithuania since 1638 , the master of the stables of lithuania since 1648 , and the starost barski . radziwi was governor of the duchy of prussia -lrb- brandenburg-prussia -rrb- -lrb- '' generalny gubernator prus ksiazecych '' -rrb- since 1657 . from 1637 to 1648 radziwi studied abroad , in germany , netherlands , england , and france . for several decades , the interests between the radziwi family and the polish -- lithuanian commonwealth had begun to drift apart , as radziw were less satisfied with the magnate status of the family and its immense wealth and began craving more political power . together with his cousin janusz radziwi in 1654 during the deluge , or swedish invasion of poland , bogusaw radziwi began negotiations with king charles x gustav of sweden aimed at breaking the commonwealth and the polish -- lithuanian union . they signed a treaty according to which the swedish -- lithuanian union was founded and the radziwis were to rule over two duchies carved up from the lands of the grand duchy of lithuania -lrb- this was also confirmed in another treaty , the treaty of radnot -rrb- . the swedish defeat and eventual retreat from the territories of the commonwealth abruptly ended the plans of janusz and bogusaw . the former died at tykocin castle besieged by forces loyal to the commonwealth , while bogusaw retreated with his forces to prussia ,...
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