Late Latin
Late Latin is the scholarly name for the written Latin of Late Antiquity. The English dictionary definition of Late Latin dates this period from the 3rd to the 6th centuries AD, extending in the Iberian Peninsula of southwestern Europe to the 7th century. This somewhat ambiguously defined period fits between Classical Latin and Medieval Latin. Although there is no scholarly consensus about exactly when Classical Latin should end, nor exactly when Medieval Latin should begin, Late Latin is characterized (with variations and disputes) by an identifiable style.
Being a written language, Late Latin is not identifiable with Vulgar Latin. The latter during those centuries served as proto-Romance, a reconstructed ancestor of the Romance languages. Although Late Latin reflects an upsurge of the use of Vulgar Latin vocabulary and constructs, it remains to a large extent classical in overall features, depending on the author. Some are more literary and classical, some more inclined to the vernacular. Nor is Late Latin identical to Christian or patristic Latin, the theological writings of the early Christian fathers. While Christian writings are considered a subset of Late Latin, pagans wrote much Late Latin, especially in the early part of the period.