What medium is "Christ Crucified between the Two Thieves: The Three Crosses"?

Christ Crucified between the Two Thieves: The Three Crosses is Drypoint printed on vellum.

Is "Christ Crucified between the Two Thieves: The Three Crosses" in the public domain?

Yes, Christ Crucified between the Two Thieves: The Three Crosses is in the public domain and available for free download under CC0 license.

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Rembrandt (Rembrandt van Rijn), 1653