Imperatoris Iustiniani Institutionum, Book 4, is a historical book written by John Baron Moyle in 1903. The book is a commentary on the fourth book of the legal code of the Byzantine Emperor Justinian I, which deals with civil law. The book is divided into several parts, including introductions, commentary, and excursus. The introductions provide background information on the legal system of the Byzantine Empire and the context in which the code was...