 Historians often refer to Roman Britain as comprising a "highland zone" to the north and west of the country and a "lowland zone" in the south and east, with the latter being more thoroughly Romanised and having a Romano-British culture.Particularly in the lowland zone, Latin became the language of most of the townspeople, of administration and the ruling class, the army and, following the introduction of Christianity, the church.Brittonic remained the language of the peasantry, which was the bulk of the population; members of the rural elite were probably bilingual.