The Fantail fibula, which have a short bow that flares into a flat, wide fan-shaped foot, were common in Britain and on the European continent. The Fantail design lasted into the 2nd century AD. A common and widespread design was the Augen (or Eye) fibula, which has a longer bow and a long, flat, wide foot. It has a short bilateral spring. Many Augen fibulae are decorated with a pair of ringed dots, or eyes, on the flat foot. Augen fibulae appear to have been introduced to the Roman Empire by Germanic peoples, notably Marcomanni, serving as Roman auxiliaries.