For 10 points, name this Italian painter of the Sleeping Venus and The Tempest.
Marcantonio Michiel claims that one painting by this artist was finished by Sebastiano del Piombo. In that painting, an old man in a cloak holds a scroll with a crescent moon on it as he talks to a man wearing a turban. One of his paintings depicts the Constanzo coat of arms on the base of a throne; in that painting, Mary sits with a red blanket on a throne between (*) Saint Liberalis and Saint Francis of Assisi. This painter of The Three Philosophers and the Castelfranco Madonna also created a painting in which a semi-nude mother in the lower right suckles her child and a single lightning bolt illuminates the stormy sky in the background. For 10 points, name this Italian painter of the Sleeping Venus and The Tempest.
Marcantonio Michiel claims that one painting by this artist was finished by Sebastiano del Piombo.
Giorgione [or Giorgio Barbarelli da Castelfranco]