Little has been found dating from the early Iron Age (the last 500 years BC). The dead were cremated, and their graves contain few burial goods. During the first four centuries AD, the people of Norway were in contact with Roman-occupied Gaul. About 70 Roman bronze cauldrons, often used as burial urns, have been found. Contact with the civilised countries farther south brought a knowledge of runes; the oldest known Norwegian runic inscription dates from the 3rd century. At this time, the amount of settled area in the country increased, a development that can be traced by coordinated studies of topography, archaeology, and place-names. The oldest root names, such as nes, vik, and bø ("cape," "bay," and "farm"), are of great antiquity, dating perhaps from the Bronze Age, whereas the earliest of the groups of compound names with the suffixes vin ("meadow") or heim ("settlement"), as in Bjǫrgvin (Bergen) or Sǿheim (Seim), usually date from the 1st century AD.