What tomb is this?

Tomb of the Bulls, Tarquinia, back wall, detail, 540 BCE, figure in helmet holding a knife behind fountain, warrior on horseback, depiction of Achilles and Troilus (Achilles hiding behind fountain, jump out and kill Troilus), (Achilles/Troilus myth not popular in Greece due to moral issues relating to Troilus being murdered outside battle), Achilles has a one sided knife and fountain that looks like an altar suggests this could be used as a sacrificial image, red ribbons thought to be a religious element