Let me help you guys out, from my understanding (in order), there are 12 capitals Armenia had in it's history, this is not counting the capital of Kilikia - Sis, since Kilikia is the first form of the Armenian diaspora, and not actually on ARMENIAN soil (southern Turkey). Anyway, here are the capitals Armenia had:
Van, Armavir, Yervandashat, Artashat, Tigranakert, Vagharshapat, Dvin, Shirakavan, Ghars, Bagaran, Ani, Erebuni/Yerevan (Erebuni and Yerevan are counted as 1 capital because Erebuni lies in the vicinity of Yerevan already, therefore it is counted as ONE capital).