One of a series of 22 portraits of Polish kings commissioned for the Marble Room at the Royal Castle in Warsaw. The painting is listed in the 1795 catalogue of the Stanisław August collection under no. 1165. Kazimierz IV (1427–92) of the Jagiellon dynasty, Grand Duke of Lithuania (from 1440) and King of Poland (reg. 1447–92). Inscribed on the back: CASIMIRUS/ JAGIELLONIDES,/ Vladislaj Varnensis/ Frater, Natus Ao 1426./ Coronatus 16. Junij 1447/ Prussiam adjunxit Regno/ Poloniae. Obijt: Grodnae/ d. 17. Junij, Ao 1492./ AEtatis Suae 66./ Regni 45./ Nro 9. The marble plaque beneath the painting is inscribed: CASIMIRUS JAGIELLONIDES/ + MCCCCXCII.