Stefano Magnani’s talk on Sidonius’ voyage to Rome (see previous post here) is now online on YouTube.
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Sylvie Crogiez-Pétrequin devotes pages 453-54 of her article ‘Les bénéficiaires du cursus publicus: des privilégiés?’, Revue historique 698 (2021) 447-62 to Sidonius’ voyage to Rome in 467.
See also her 2010 article ‘Sidoine Apollinaire et le col du Petit Saint Bernard’ (biblio, tab 2010).