What medium is "July and August (part of a set illustrating months of the year)"?

July and August (part of a set illustrating months of the year) is Oil on canvas; wood frame, painted yellow and gilded.

Is "July and August (part of a set illustrating months of the year)" in the public domain?

Yes, July and August (part of a set illustrating months of the year) is in the public domain and available for free download under CC0 license.

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This artwork was created second quarter 18th century.

Antoine Watteau, second quarter 18th century