Rudolf II, Holy Roman Emperor
Martin Kober (also "Chober, Cober, Coeber, Khober, Koeber, Koebner", ) (ca. 1550 – before 1598) was a portrait painter and court painter to different Central European monarchs - King Stephen Báthory, Rudolf II, Holy Roman Emperor, Queen Anna Jagiellon and King Sigismund III Vasa, active mainly in the Polish–Lithuanian Commonwealth.