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. 1168. Zygmunt I the Old (1467–1548) of the Jagiellon dynasty, King of Poland and Grand Duke of Lithuania (reg. 1506–48). Red number 1168 of Stanisław August collection bottom centre. Inscribed on the back: SIGISMUNDUS I./ Casimiri Jagiellonidis/ Filius, Ioannis Alberti,&/ Alexandri I. Frater, natus 1. Ian/ Ao. 1467. Designat[us] 8 Xbr: Ao. 1506./ Coronatus 24. Januar: Ao. 1507/ Prudens. Fortis, Dives-/ CAROLO V. Imperatori, &/ Francisco I. Galliae Regi-/ Coaevus et aequiparatus./ Obijt Cracoviae. d: I. Apr: 1548/ AEtatis: 81. Regni 42./ Nro 12 The marble plaque beneath the painting is inscribed: SIGISMUNDUS I/ + MDXLVIII.