One of the most famous reliefs in the Temple of Ramses II at Abu Simbel is this one of Ramses II
in his chariot depicting the Battle of Kadesh.
Note how the sculptor has depicted the two side-by-side horses by showing 4 legs.
The image is not sharp due to very low light in the temple interior, but I include it here anyway !

35mm slide scanned using Promasater Digital Slide duplictor attahced to a Canon Pro 1. Original slide made with Canon A-1.