600s }} Events By Place Europe Spoleto becomes the capital of an independent duchy under the Lombard chieftain Faroald. Asia Estimation: Ctesiphon, capital of the Sassanid Empire, becomes the largest city of the world, taking the lead from Constantinople, capital of the Byzantine Empire.(External Link) Abraha failed attack on the Kaaba in Mecca. By Topic Religion First mention of the Spear of Destiny (approximate date). The Jews of Clermont-Ferrand are forced to convert to Christianity.… (More on 570)