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Calliste I (patriarche de Constantinople, 13..?-1363) : Oratio de exaltatione crucis (BHG 424), Portal Biblissima. Permalink: https://biblissima.demo.logilab.fr/ark:/43093/oedata9159f54f625aff42f7e9cc21ca3ad66ece6eca70 (seen 17/10/2026)
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