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. 1167. Aleksander I (1461–1506) of the Jagiellon dynasty, Grand Duke of Lithuania from 1492, King of Poland (reg. 1501–6). Red number 1167 of Stanisław August collection bottom centre. Inscribed on the back: ALEXANDER I./ CASIMIRI Jagiellonidis/ Filius, Joannis Alberti/ Frater, Natus d: 5. 8bris Ao/ 1461. Coronatus d: 12 Xbris/ Ao 1501. Obijt Vilnae/ D: 19 Augus: Ao 1506. / AEtatis suae 45./ Regni 5./ Nro 11. The marble plaque beneath the painting is inscribed: ALEXANDER I/ + MDVI.