They were a favorite subject of Theodore Gericault, who painted a pair of fightings ones as well as one of them frightened by lightning while Leonardo da Vinci cast a gigantic bronze statue of one for Francesco Sforza.
In the singular, one of these gives its name to a 1914 bronze sculpture by Raymond Duchamp-Villon, considered to be his masterpiece. They were a favorite subject of Theodore Gericault, who painted a pair of fightings ones as well as one of them frightened by lightning while Leonardo da Vinci cast a gigantic bronze statue of one for Francesco Sforza. George Stubbs painted numerous depictions of these creatures, including a 1766 Anatomy of one and a 1762 painting of one attacked by a Lion, and Johan Fuseli painted one of these poking its head through parted curtains in The Nightmare. Famously painted at a namesake "Fair" by Rosa Bonheur, for ten points, identify these quadrupeds which are being ridden by the hunters in Rubens' Lion Hunt.
In the singular, one of these gives its name to a 1914 bronze sculpture by Raymond Duchamp-Villon, considered to be his masterpiece.
horses (accept all logical equivalents)