Several Bronze Age cultures and states flourished in the area of Greater Armenia, including the Trialeti-Vanadzor culture, Hayasa-Azzi, and Mitanni (located in southwestern historical Armenia), all of which are believed to have had Indo-European populations. The Nairi confederation and its successor, Urartu, successively established their sovereignty over the Armenian Highlands. Each of the aforementioned nations and confederacies participated in the ethnogenesis of the Armenians. A large cuneiform lapidary inscription found in Yerevan established that the modern capital of Armenia was founded in the summer of 782 BC by King Argishti I. Yerevan is the world's oldest city to have documented the exact date of its foundation.