This subtle little bull is from a grave enclosure of Dionysios of Kollytos which was situated along the Way of the Tombs. It was placed on a high pedestal within the grave enclosure, and I can imagine it had a quite formidable look.
Made of marble, the bull dates to around 345BC and 340BC. Dionysios died unmarried and lived nearby to Kerameikos, at Kollytos. He served as a treasurer in Heraion in the years 346 and 345BC.