Interprétation de la lettre ταῦ sur le vêtement du Christ et du geste de l’ogdoade sur la mosaïque absidiale de l’église Santa Pudenziana à Rome
The author explores the interpretation of the Greek letter tau on the robe of Christ represented on the 4th-century apsidal mosaic in the church of Santa Pudenziana in Rome, as well as the sign of the Ogdoad that Christ makes with his fingers. He discusses the ancient written sources for the symbolic meaning of the letter, as well as the letters iota and gamma, also found in similar early Christian contexts, as well as the iconographic evidence for the use of the letter tau, seen as a cross in shape, in glyptics, amulets, inscriptions and relief sculpture on sarcophagi, among others. In the context of the Santa Pudenziana mosaic, the presence of the letter is significant for the interpretation of the representation as symbolizing the redemption of man through the Passion of the Lord. The sign of the Ogdoad should be seen as evocation of the universal nature of the resurrection of Christ for all mankind, making the presence of the tau on Christ’s robes in this representation entirely comprehensible.