Mikołaj Trąba, of Trąby coat of arms (Polish pronunciation: [mʲiˈkowaj ˈtrɔ̃ba]; 1358 – 2 December 1422) was a Polish Roman Catholic priest, Royal Notary from 1390, Deputy Chancellor of the Crown 1403–12, bishop of Halicz 1410–12, archbishop of Gniezno from 1412, and first primate of Poland 1417–22.
Born in Sandomierz, he was the son of priest Jakub of Collegiate Chapter, and was adopted into the nobility (szlachta).
He was one of the advisors of king of Poland, Jogaila (Władysław II Jagiełło), becoming his confessor in 1386 and accompanying him during the baptism of Lithuania in 1387 [1]. At court he held the titles of Royal Notary from 1390 and Deputy Chancellor of the Crown from 1403 to 1412. In 1391 with the help of queen Jadwiga of Poland he was allowed by Pope Boniface IX to undertake higher Holy Orders[2]. He was known for his opposition to the Teutonic Knights, and become trusted advisor of the king who often would discuss his plans only with him and his cousin Vytautas the Great[3].