BCE-0200 sanchi-toe-stirrup BCE-0200 selucid-coin see thigh-grip BCE-0645Ashurbanipal lion-hunt BCE-2500 sumer-chariot-horses standard-of-ur CE-0079 pompeii-horse-rider CE-0100 roman-horse-rider-mosaic CE-0100 roman-mosaic-alexander-vs-darius CE-0600 khusrow-with-horse-shabdiz CE-1050 norman-conquest-tapestry leg-ratio stirrups CE-1250 French-tapestry larger-horse see leg-ratio bone-structure horse-biomes saddle-fit precision-engineering saddle-front-leg-muscle spine-gap saddle-weight-distribution size-comparison