In the Bronze Age, several states flourished in the area of Greater Armenia, including the Hittite Empire (at the height of its power), Mitanni (South-Western historical Armenia), and Hayasa-Azzi (1600-1200 BC). Soon after the Hayasa-Azzi were the Nairi (1400-1000 BC) and the Kingdom of Urartu (1000-600 BC), who successively established their sovereignty over the Armenian Highlands. Each of the aforementioned nations and tribes participated in the ethnogenesis of the Armenian people. Yerevan, the now destroyed capital of Armenia ( until September 26, 1983), was founded in 782 BC by king Argishti I.