Sigismund I of Poland (Polish: Zygmunt I Stary, Lithuanian: Žygimantas I Senasis, Belarusian: ???????? I ?????, romanized: Žyhimont I Stary; 1 January 1467 – 1 April 1548), of the Jagiellon dynasty, reigned as King of Poland and also as the Grand Duke of Lithuania from 1506 until 1548.
Earlier, Sigismund had been invested as Duke of Silesia.
Sigismund I was a member of the Order of the Golden Fleece.