For 10 points, name this animal on which Christ rides in Christ's Entry into Brussels.
A young one of these animals points at book open to a page with four "A's" on it in a print satirizing education, and another tends to a sick man in What will he die from?  One of these animals wears human clothes and holds a book open to images of his ancestors in the etching, As far back as his grandfather.  Two thieves fight each other in the foreground as a third steals one of these animals in an Honore Daumier painting based on a Jean de La Fontaine fable. These animals appear in the 37th to 42nd of (*) Francisco Goya's Los Caprichos. Vincent Van Gogh painted a beardless self-portrait of himself being lifted onto one of these animals in a Biblical painting inspired by Delacroix.  The title figure rides one of these animals below a sign reading "Vive La Sociale" in a painting by James Ensor.  For 10 points, name this animal on which Christ rides in Christ's Entry into Brussels.
A young one of these animals points at book open to a page with four "A's" on it in a print satirizing education, and another tends to a sick man in What will he die from?  
donkeys [or asses]