"Leading a Bull to the Sacrificial Altar" (see related A) Callimachus Uffizi Gallery, Florence, Tuscany, Italy

Roman copy (c. 125 AD) from a relief in the Temple of Athena Nike on the Acropolis in Athens c. 420 BC. 

Note: altar (alto implies high or elevation) - a high table for sacrifices - instead of sacrifices of food, gold, etc., there is a universal propensity of religious sacrifices demanding blood - Abraham was urged to sacrifice his son ...  

Medicine: sacrum, sacred ... sacrificed animals not eaten were consumed by flames - the most likely bone not to be consumed was name "sacrum".