Marcin Kromer, Prince-Bishop of Warmia (d. 1589)
Marcin Kromer (Latin: Martinus Cromerus; 11 November 1512 – 23 March 1589) was Prince-Bishop of Warmia (Ermland), a Polish cartographer, diplomat and historian in the Kingdom of Poland and later in the Polish–Lithuanian Commonwealth. He was a personal secretary to two Kings of Poland, Sigismund I the Old and Sigismund II Augustus.