Psi (Greek)
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Psi SY, SEE is the twenty-third and penultimate letter of the Greek alphabet and is associated with a numeric value of 700. In both Classical and Modern Greek, the letter indicates the combination.
The Greek alphabet on a black-figure pottery vessel, with an archaic chickenfoot-shaped psi.
Claudian letters
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The Claudian letters were a set of three new letters for the Latin alphabet developed by the Roman emperor Claudius, who reigned the Roman Empire from the year 41 to the year 54. These letters, accord
Psi (Greek)
…Arcadian variant or was adopted in the Latin alphabet in the form of "Antisigma" (Ↄ, ↃC, or 𐌟) during the reign of Emperor Claudius as one of the three Claudian letters. However, it was abandoned after his death. The classical Greek letter was adopted into the early Cyrillic alphabet as "Ѱ…
Claudian pomerium marker, where written words ampliavit and terminavit use turned digamma (highlighted in red)