Greco-Roman theory Early examples of letter-writing theory can be found in
C. Julius Victor's
Ars rhetorica and
Cassiodorus Senator's
Variae epistolae. Other examples can be found in the Pseudo-Demetrius'
Typoi epistolikoi, Pseudo-Libanius'
Epistolimaioi kharacteres, Demetrius'
Peri hermeneias, Philostratus of Lemnos' treatise, and
Gregory of Nazianus'
Epistle 51. Latin Middle Ages During the Latin medieval period, the standing assumption was that these writings would be composed in
Latin, and according to well worked-out models. This made the arts of composition a subfield of
rhetoric. Medieval letter writing developed for ecclesiastical, government, and business purposes. Important figures in the early development of Latin letter writing and document composition include
Alberic of Monte Cassino (
Dictaminum radii, Breviarium), his critic
Adalbert of Samaria (
Praecepta dictaminum, c. 1120),
Hugh of Bologna (
Rationes dictandi prosaice, c.1120),
Bernard of Bologna's
Introductiones prosaici dictaminis (1145) and Baldwin (
Liber de dictaminibus, c.1150). ==See also==