Russian archaeologists said Wednesday they had found the long-lost capital of the Khazar kingdom in southern Russia, a breakthrough for research on the ancient Jewish state. "This is a hugely important discovery," expedition organiser Dmitry Vasilyev told AFP by telephone from Astrakhan State University after returning from excavations near the village of Samosdelka, just north of the Caspian Sea. "We can now shed light on one of the most intriguing mysteries of that period -- how the Khazars actually lived. We know very little about the Khazars -- about their traditions, their funerary rites, their culture," he said. The city was the capital of the Khazars, a semi-nomadic Turkic peoples who adopted Judaism as a state religion, from between the 8th and the 10th centuries, when it was captured and sacked by the rulers of ancient Russia. The capital is referred to as Itil in Arab chronicles but Vasilyev said the word may actually have been used to refer to the Volga River on which the city was founded or to the surrounding river delta region. WikiPedia: Atil, also spelled Itil (literally meaning "Big River"), was the capital of Khazaria from the middle of the 8th century until the end of the 10th century. The word is also a Turkic name for the Volga River. Quaerentia: The Jewish state of Khazaria. Khazaria.com: AN INTRODUCTION TO THE HISTORY OF KHAZARIA.