History of the Romanian language

The history of the Romanian language started in Roman provinces north of the Jireček Line in Classical antiquity. There are three main hypotheses around its exact territory: the autochthony thesis (it developed in left-Danube Dacia only), the discontinuation thesis (it developed in right-Danube provinces only), and the "as-well-as" thesis that supports the language development on both sides of the Danube. Between the 6th and 8th centuries AD, following the accumulated tendencies inherited from the vernacular Latin and, to a much smaller degree, the influences from an unidentified substratum, and in the context of a lessened power of the Roman central authority, the language evolved into Common Romanian. This proto-language then came into close contact with the Slavic languages and subsequently divided into Aromanian, Megleno-Romanian, Istro-Romanian, and Daco-Romanian. Because of limited attestations between the 6th and 16th centuries, entire stages from its history are reconstructed by researchers, often with proposed relative chronologies and loose limits.