death_date other_post nationality coat_of_arms birth_date term_end death_place imagesize title term_start image name predecessor birth_place buried type successor religion article_title
1 april 1455 statesman and diplomat polish dębno kardynał.png 5 december 1389 1455 sandomierz , kingdom of poland 225px cardinal archbishop of kraków 1423 cardinal_zbigniew_ole % c5 % 9bnicki.png zbigniew oleśnicki wojciech jastrzębiec sienno , kingdom of poland wawel cathedral cardinal tomasz strzępiński roman catholic zbigniew oleśnicki -lrb- cardinal -rrb-

zbigniew oleśnicki -lrb- cardinal -rrb-

zbigniew oleśnicki -lrb- ; 5 december 1389 in sienno , masovian voivodeship -- 1 april 1455 -rrb- , known in latin as sbigneus , was a high-ranking roman catholic clergyman and an influential polish statesman and diplomat .
he served as bishop of kraków from 1423 until his death in 1455 .
he took part in the management of the country 's most important affairs , initially as a royal secretary under king władysław ii jagiełło and later as the effective regent during king władysław iii 's minority .
in 1449 he became the first native polish cardinal .
