The kingdom originated in the southern side of the western Pyrenees, in the flatlands around the city of Pamplona. According to Roman geographers such as Pliny the Elder and Livy, these regions were inhabited by the Vascones and other related Vasconic-Aquitanian tribes, a pre-Indo-European group of peoples who inhabited the southern slopes of the western Pyrenees and part of the shore of the Bay of Biscay. These tribes spoke an archaic version of the Basque language, usually known by linguistics as Proto-Basque, as well as some other related languages, such as the Aquitanian language. The Romans took full control of the area by 74 BC, but unlike their northern neighbors, the Aquitanians, and other tribes from the Iberian Peninsula, the Vascones negotiated their status within the Roman Empire. The region first was part of the Roman province of Hispania Citerior, then of the Hispania Tarraconensis. It would be under the jurisdiction of the conventus iuridicus of Caesaraugusta (modern Zaragoza).