Section 01: Foundations
The opening section of the St. Leo the Great compendium establishes the man before the legend: his Roman-Tuscan origins, his two decades as deacon and archdeacon under Celestine I and Sixtus III, the imperial mission to Gaul during which he was elected Bishop of Rome in 440, and the conception of the papal office — the indignus heres beati Petri — that he carried into a twenty-one-year pontificate spanning the collapse of the Western Empire.
Tradition: Pan-Orthodox (Church Father / Latin)
Contents
| File | Title | Scope |
|---|---|---|
| the-deacon-who-became-pope.md | The Deacon Who Became Pope | Roman/Tuscan origins (Liber Pontificalis); the office of archdeacon of Rome; service under Celestine I and Sixtus III; the Cassian dedication and Leo’s early Christological alertness; the Gaul mission (Aëtius and Albinus); the death of Sixtus III (440); election in absentia and consecration on 29 September 440. |
| the-man-and-the-office.md | The Man and the Office | The setting of the collapsing Western Empire; Valentinian III and the Rescript of 445; Leo as the “unworthy heir of blessed Peter”; the fusion of administrator, theologian, and preacher in one man; why he is called “the Great”; the sparse personal record set against the vast public one. |
How to Use
- Read The Deacon Who Became Pope first for the documented biography up to the election of 440.
- Then read The Man and the Office for the reflective frame — who Leo understood himself to be, and the office he believed he held. The full doctrine of Roman primacy that flows from this self-understanding is reserved for Section 05.
Cross-References
- The Tome to Flavian — the doctrinal achievement toward which the early Christological alertness pointed.
- The Petrine Theology — the developed doctrine of the see of Peter at which this section only hints.
- Church Fathers — the patristic framework into which Leo enters.
- Methodology — the governing citation and verification standard.
References
Full primary- and secondary-source citations are given at the foot of each content file. The principal sources are the Liber Pontificalis, Leo’s own sermons (especially the anniversary-of-consecration sermons, CCSL 138; trans. Freeland & Conway, FOTC 93) and letters (PL 54; trans. Feltoe, NPNF 2nd ser. vol. 12; Hunt, FOTC 34), and the modern studies of T. Jalland, Susan Wessel, and Bronwen Neil.