One of four major peoples / kingdoms of southern Arabia in the 1st millennium BC, contemporary with the Minaeans, Qatabanians, and Hadramites. The Sabaean capital was at Marib (Ma'rib). The people who called themselves Saba' (biblical Sheba) are both the earliest and the most abundantly attested in the surviving written records. Sabaean rulers - who are mentioned in Assyrian annals of the late 8th and early 7th centuries BC - were responsible for impressive cultural and irrigational constructions. Two secondary centers were Sirwah, on a tributary of the Wadi Dhana above the dam, and Nashq (now Al-Bayda'), at the western end of Wadi Al-Jawf.