For a year and half Rosa Bonheur dressed in mens clothes and wandered the Parisian horse market at the Boulevard de l’Hôpital. Her sketches informed The Horse Fair — a painting of such grand scale that Bonheur called it her “Parthenon frieze.”
The Horse Fair was first shown in the Paris Salon in 1583, but Rosa reworked the painting for the next two years. 32 years later the painting would be aired by Cornelius Vanderbilt, who donated it to the Metropolitan Museum of Art.
Reed Enger, "The Horse Fair," in Obelisk Art History, Published March 26, 2016; last modified May 19, 2021, http://arthistoryproject.com/artists/rosa-bonheur/the-horse-fair/.