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Intaglio with Chi and Iota, 190-300 AD, Swiss National Museum.
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The 5th century Byzantine Column of Marcian displays the XI monogram inside a wreath.
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Detail of IX monogram on Constantinople sarcophagus, end of 3rd, early 4th century.
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Cover of Merovingian sarcophagus, Musée de Saint-Germain-en-Laye.
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Merovingian sarcophagus symbol, 6-7th century, Paris. Musée Carnavalet
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Slab sarcophagus, Beyazit, Constantinople, 5th century.
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Constantinople Christian sarcophagus with XI monogram, circa 400.
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Detail of the early Christian IX monogram in the chapel of La Gayolle (La Celle, Var).