Modern-day Slovakia was dominated for centuries by Germanic peoples, including the Quadi and the Langobards or Lombards, who were there until the middle of the 6th century. A new material culture characterized by handmade pottery, cremation burials and small, square, sunken huts that typically featured a corner stone oven appeared in the plains along the Middle Danube around that time. The new culture, with its "spartan and egalitarian" nature, sharply differed from the earlier archaeological cultures of Central Europe. According to Barford, a report by the Byzantine historian Procopius is the first certain reference to Early Slav groups inhabiting parts of present-day Slovakia. Procopius wrote that an exiled Lombard prince named Hildigis mustered an army, "taking with him not only those of the Lombards who had followed him, but also many of the Sclaveni" in the 540s.