Who created "Study for the Age of Bronze"?

Study for the Age of Bronze was created by Pietro da Cortona (Pietro Berrettini) in 1637.

What medium is "Study for the Age of Bronze"?

Study for the Age of Bronze is Pen and brown ink, brush and brown wash, over black chalk.

Yes, Study for the Age of Bronze is in the public domain and available for free download under CC0 license.

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Pietro da Cortona (Pietro Berrettini), 1637