Letters
Testo originale: Migne, Patrologia Latina 144, 205-498 (eight books, in the arrangement of Costantino Gaetani, 1606-1640).
Latin text only; 'en' is empty. Chapter headings are Migne's Latin rubrics. Migne's editorial argument and notes are omitted. Refs are book.letter in Migne's arrangement (the modern numbering of Reindel's MGH edition, 1983-93, differs and is not used). Letters that Migne prints only by title (their text stands among the opuscula in PL 145) have no division.
- Book I: To the supreme pastors of the Christian commonwealth (popes)
- Book II: To the cardinal bishops of the Roman Church
- Book III: To patriarchs and archbishops
- Book IV: To bishops
- Book V: To archpriests, archdeacons, priests and clerics
- Book VI: To abbots and monks
- Book VII: To secular princes
- Book VIII: To illustrious men and others