Is "Don Quixote on horseback with a barber's bowl on his head as a hat" in the public domain?

Yes, Don Quixote on horseback with a barber's bowl on his head as a hat is in the public domain and available for free download under CC0 license.

Ctrl K

Don Quixote on horseback with a barber's bowl on his head as a hat

This artwork was created 1723–24.

Charles Antoine Coypel|Louis Surugue, 1723–24