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George I Rákóczi (1593–1648) was a Hungarian nobleman who served as Prince of Transylvania from 1630 until his death. Before acceding to the throne, he was a leader of the Protestant faction in Hungary and a faithful supporter of Prince Gabriel Bethlen. When Bohemian nobles requested military support in their struggles against the Habsburg monarchy, Rákóczi persuaded Bethlen to help and commanded Transylvanian forces in several battles. After Bethlen's death, there were short reigns by his wife and then his brother, but the Transylvanian parliament elected Rákóczi as Bethlen's permanent successor. His reign was notable for his role in the Thirty Years' War, with a campaign against Ferdinand III, Holy Roman Emperor, from 1644 to 1645. After Rákóczi held Upper Hungary and most of Lower Hungary at one point, the fighting was ended by the Treaty of Linz, under which seven counties of Upper Hungary were annexed by Transylvania. This etching of Rákóczi was produced in 1631 by the Dutch Golden Age artist Jan Gillisz. van Vliet, after an earlier design by Rembrandt, Van Vliet's teacher. The illustration is in the collection of the Rijksmuseum in Amsterdam.Illustration credit: Jan Gillisz. van Vliet, after Rembrandt