In 1911, Franz Pichlmayr listed Vatican codex Barb. Lat. 812 as a manuscript attributing De uiris illustribus to Aurelius Victor—a unique and significant claim. Later scholars, notably Sage, questioned the reliability of the claim and urged caution owing to past cataloguing errors. A 2025 examination of Barb. Lat. 812 revealed that it contains records from the Council of Trent, not De uiris illustribus. Attempts to resolve the discrepancy by checking related shelfmarks were unsuccessful. Whether Pichlmayr’s manuscript ever existed—and, if it did, what its identity was—remains unknown.
