Pomerania during the Early Middle Ages covers the History of Pomerania from the 7th to the 11th centuries. The southward movement of Germanic tribes during the migration period had left territory later called Pomerania largely depopulated by the 7th century. Between 650 and 850 AD, West Slavic tribes settled in Pomerania. The tribes between the Oder and the Vistula were collectively known as Pomeranians, and those west of the Oder as Veleti and later Lutici. A distinct Slavic tribe, the Rani, was based on the island of Rügen and the adjacent mainland. In the 8th and 9th centuries, Slavic-Scandinavian emporia were set up along the coastline as powerful centers of craft and trade.