The 1st century AD saw several other bow variations. The Wolf or Wolf's Head fibula has a flat, ribbon-like bow that widens into a square section at the head. The common design of two circles and a chevron near the rear of the bow is often interpreted as a wolf’s head. The Thracian Anchor type has a wide crescent at the head giving the fibula an anchor shape. The Thracian Anchor type is also called the Illyrian and is found in Pannonia (Hungary), Dacia (Romania) and Serbia.