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.

Source: Wikipedia — History of the Romanian language (CC BY-SA 4.0)