In 1996, Zaza Aleksidze of the Centre of Manuscripts in Tbilisi, Georgia, discovered a palimpsest at Saint Catherine's Monastery on Mount Sinai, Egypt, with an unknown script. He went on to identify the alphabet as Caucasian Albanian, and to identify the manuscript as an early Christian lectionary from about the 5th or 6th century. The lectionary may be the earliest extant lectionary in the Christian religion.