Jerzy Siemiginowski-Eleuter (born around 1660 in Lviv, died 1711) is a Polish painter and graphic artist, son of Jerzy Szymonowicz. He described himself as Knight Eleuter (gr. free, independent). In his youth he was placed under the care of Jan III Sobieski, who provided him with the best artistic education in Italy and France. He worked as a decorator and portraitist of the royal family. At the royal court he gained an unusual favor, and by the king was referred to as a householder.
He is a very well-known and valued artist, one of the most important painters of classicism in the Baroque period.
With his rich output not many paintings have survived, almost all of Eleuter's surviving works can be found in the palace in Wilanów.
Selected works: Portrait of Queen Maria Kazimiera with children, Spring, Construction of the Babel Tower, God's wrath over the construction of the Tower of Babel, Bachus and Ariadne.