The Italic languages form a branch of the Indo-European language family, whose earliest known members were spoken on the Italian Peninsula in the first millennium BC. The most important of the ancient Italic languages was Latin, the official language of ancient Rome, which conquered the other Italic peoples before the common era. The other Italic languages became extinct in the first centuries AD as their speakers were assimilated into the Roman Empire and shifted to some form of Latin. Between the third and eighth centuries AD, Vulgar Latin diversified into the Romance languages, which are the only Italic languages natively spoken today, while Literary Latin also survived.