Biskup krakowski Zbigniew Oleśnicki (1423-1455) wobec husytyzmu i polityki polsko-czeskiej

The article concerns the attitude of the Bishop of Cracow, Zbigniew Oleśnicki to the Hussite doctrine and to the proposal of assuming the Bohemian throne by the Jagiellonian dynasty in the 20s and 30s of the fifteenth century. The author analyzes the attitudes and activities of the bishop in the light of the sources of the period as well as in the light of the opinions of historiography. A special attention is devoted to the criticism of the account given by a chronicler Jan Długosz, who was particularly interested in making Zbigniew Oleśnicki a principled defender of the faith against the Hussite threat.