Codicology is a field of study which concentrates on late antique, mediaeval and early modern manuscripts (lat. codex –> codicology). The work starts with the description of a codex and then proceeds to date and localise the book and describe its contents. In the dating of paper codices, the marks of the manufacturer of the material — the watermarks — are a great help.
When understood in the broadest meaning of the word, codicological study includes research on the history of the manuscripts or manuscript groups, as well as tracking the owners and readers of the books with the help of notes and annotations (so-called glossae and scholia). An important question is when and how a manuscript found its way to its present location. All this is part of the history of the area, in this case, the cultural and social history and the history of ideas of the Eastern Mediterranean and the Greek Orthodox Church in Egypt.