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 some Qumran documents, YHWH is written in Paleo-Hebrew while the rest of the text is in Aramaic square script. The vast majority of the Hasmonean coinage, as well as the coins of the First Jewish–Roman War and Bar Kokhba's revolt, bears Paleo-Hebrew legends. The Paleo-Hebrew alphabet fell completely out of use only after 135 CE. The paleo-Hebrew alphabet continued to be used by the Samaritans and is also known as the Samaritan alphabet. The Samaritans have continued to use the script for writing both Hebrew and Aramaic texts until the present day. A comparison of the earliest Samaritan inscriptions and