sentences:  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.During the late 6th century BC, the first geographical entity that was called Armenia by neighbouring populations was established under the Orontid Dynasty within the Achaemenid Empire, as part of the latters' territories.