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Open in GlekThe design features a portrait of the Greek mathematician Constantin Carathéodory. Inscribed along the inner edge at the left is the wording ‘CONSTANTIN CARATHÉODORY 1873-1950’, and at right the minting year ‘2023’ and a palmette (mintmark of the Greek Mint); below the portrait runs the inscription ‘HELLENIC REPUBLIC’. The coin’s outer ring bears the 12 stars of the European flag.