Who created "Study of a Palm Tree (recto); Mountain Landscape (verso)"?

Study of a Palm Tree (recto); Mountain Landscape (verso) was created by Nicolas Poussin in ca. 1635–40.

What medium is "Study of a Palm Tree (recto); Mountain Landscape (verso)"?

Study of a Palm Tree (recto); Mountain Landscape (verso) is Pen and brown ink, over traces of black chalk (recto); pen and brown ink (verso).

Yes, Study of a Palm Tree (recto); Mountain Landscape (verso) is in the public domain and available for free download under CC0 license.

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This artwork was created ca. 1635–40.

Nicolas Poussin, ca. 1635–40