Urszula Mayerin
...that a woman, chamberlain Urszula Mayerin, was among the most influential figures at Sigismund III Vasa's court, signing official state documents in his name and receiving foreign ambassadors during his illness?
...that a <a href="./Woman" id="mwCMs" rel="mw:WikiLink" title="Woman">woman</a>, <a href="./Chamberlain_(office)" id="mwCMw" rel="mw:WikiLink" title="Chamberlain (office)">chamberlain</a> <b id="mwCM0"><a class="mw-redirect" href="./Urszula_Mayerin" id="mwCM4" rel="mw:WikiLink" title="Urszula Mayerin">Urszula Mayerin</a></b>, was among the most influential figures at <a href="./Sigismund_III_Vasa" id="mwCM8" rel="mw:WikiLink" title="Sigismund III Vasa">Sigismund III Vasa</a>'s <a class="mw-redirect" href="./Noble_court" id="mwCNA" rel="mw:WikiLink" title="Noble court">court</a>, signing official state documents in his name and receiving foreign ambassadors during his illness?