 Jan Zamoyski or Zamojski ( Latin : Ioannes de Zamość ; 1542 – 1605 ) was a Polish nobleman , magnate , and the 1st ordynat of Zamość . Royal Secretary from 1566 , Deputy Kanclerz ( Chancellor ) of the Crown from 1576 , Lord Grand @-@ Chancellor of the Crown from 1578 , and Grand Hetman of the Crown from 1581 . General Starost of Kraków from 1580 to 1585 , Starost of Bełz , Międzyrzecz , Krzeszów , Knyszyn and Tartu . Important advisor to Kings Sigismund II Augustus and Stephen Báthory , he was one of the major opponents of Bathory 's successor , Sigismund III Vasa , and one of the most skilled diplomats , politicians and statesmen of his time , standing as a major figure in the politics of the Polish @-@ Lithuanian Commonwealth throughout his life . 
