Ma'rib or Marib is the capital city of the Ma'rib Governorate, Yemen and was the capital of the Sabaean kingdom, which some scholars believe to be the ancient Sheba of biblical fame. It is located at approximately 120 kilometers east of Yemen's modern capital, Sana'a. The Sabaean kingdom was located in what is now Marib in southwestern Yemen. The Sabaean kings made their capital at Ma'rib, and built great irrigation works such as the Ma'rib dams, whose ruins are still visible. The Marib Dam supported a flourishing culture for more than a thousand years before collapsing in 575 CE. They also built castles and temples in the area, and were known for trading valuable frankincense and myrrh. They were a seafaring people and known to have influence and a population in the Northeast African kingdom of Damt, across the Red Sea in Eritrea and perhaps Ethiopia, the only other source of both frankincense and myrrh.