Human-headed winged bull, also known as a Šedu, Gypsum, Neo-Assyrian Period, 721-705 BCE
This colossal sculpture was one of a pair that guarded the entrance to the throne room of King Sargon II. A protective spirit known as a “lamassu”, it is shown as a composite being with the head of a human, the body and ears of a bull, and the wings of a bird. When viewed from the side, the creature appears to be walking; when viewed from the front, to be standing still. Thus it is actually represented with five, rather than four, legs. - OIUC webpage.