The late 1st century AD saw the introduction of the Kraftig Profilierte group of fibula designs. Kraftig Profilierte fibulae have a wide fan-, or bell-shaped head and a long thin pointy foot. They have long bilateral hinges. There are three main variations of the Kraftig Profilierte fibula. The North Pannonian Double Knot type, found in Pannonia has two knobs, or knots, on the bow. The Single Knot type, found in the central Balkans, has a single knob. The Black Sea type, found in the steppes north of the Black Sea, has a thin body, with no flaring near the head, and two knots. Kraftig Profilierte fibulae were found in the late 1st to late 2nd centuries AD and are mostly associated with the Przeworsk proto-Gothic culture.