Who created "Studies of a Head and a Hand"?

Studies of a Head and a Hand was created by Andrea del Sarto (Andrea d'Agnolo) in 1510.

What medium is "Studies of a Head and a Hand"?

Studies of a Head and a Hand is Red chalk.

Yes, Studies of a Head and a Hand is in the public domain and available for free download under CC0 license.

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Andrea del Sarto (Andrea d'Agnolo), 1510