Is "Imaginary Landscape with the Palatine Hill from Campo Vaccino" in the public domain?

Yes, Imaginary Landscape with the Palatine Hill from Campo Vaccino is in the public domain and available for free download under CC0 license.

Ctrl K

Imaginary Landscape with the Palatine Hill from Campo Vaccino

This artwork was created early 1730s.

François Boucher, early 1730s