Like many other countries of Western Europe, Croatia too developed in an area that once made part of the Roman Empire. In the maelstrom of the great migrations of peoples that took place Europe-wide after the fall of Rome, the Croat tribes took over this area. The Croats established their own princedom as early as the 7th century and founded an independent state in the 9th century. In the 10th century the Kingdom of the Croats came into being, ruled by the national kings. From the time of the conversion to Christianity, which was completed in the 9th century, the Croats became a part of Western Christendom and of the society of Western Europe.