Youths ready to mount. (slab XLII), from the north frieze of the Parthenon,

Greek, c438-432 BC. Designed by Phidias.

The Parthenon frieze adorned the the temple of Athena on the Acropolis in Athens and represents a procession in honour of the Olympian gods.

British Museum, London.

http://wapedia.mobi/en/Elgin_Marbles

http://www.athensinfoguide.com/wtsacropelgin.htm

http://www.parthenonfrieze.gr/#/read/text6