About the Mystery of the Letters the mid-6th century, in which Mar Saba had played an important role. The anonymous author of the treatise declares he was prompted to the study of the secret meanings of the letters by the words of the Apocalypse, "I am the Alpha and Omega", and that he subsequently received a vision about them on Mount Sinai. The author proposes a re-modelled Greek alphabet reduced to 22 letters on the model of the 22 letters of Hebrew (discounting Xi Ξ and Psi Ψ), and with the Hebrew letter names. He then interprets these letters as symbolic figures of 22 works of
Paleo-Hebrew alphabet began to fall out of use by the Jews in the 5th century BCE, when the Aramaic alphabet was adopted as the predominant writing system for Hebrew. The present Jewish "square-script" Hebrew alphabet evolved from the Aramaic alphabet. The Samaritans, now fewer than 1,000 people, have continued to use a derivative of the Paleo-Hebrew alphabet, known as the Samaritan alphabet. While the use of the script is negligible nowadays, it is present in some symbolic usage, such as the ₪1 coin and the logo of the Israeli town Nahariyah. The chart below compares the letters of the Phoenician script with