Guidobaldo II della Rovere, Duke of Urbino
Guidobaldo II della Rovere was an Italian condottiero, who succeeded his father Francesco Maria I della Rovere as Duke of Urbino from 1538 until his death in 1574. He was a member of the House of La Rovere. Guidobaldo was an important patron of the arts in general, and of Titian in particular, commissioning Titians Venus of Urbino.
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Source: Wikipedia