What medium is "Portrait of a Woman, Said to Be Caritas Pirckheimer (1467–1532)"?

Portrait of a Woman, Said to Be Caritas Pirckheimer (1467–1532) is Oil on linen.

Is "Portrait of a Woman, Said to Be Caritas Pirckheimer (1467–1532)" in the public domain?

Yes, Portrait of a Woman, Said to Be Caritas Pirckheimer (1467–1532) is in the public domain and available for free download under CC0 license.

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Albrecht Dürer