Syriac Aramaic (also "Classical Syriac") is the literary, liturgical and often spoken language of Syriac Christianity. It originated by the first century AD in the region of Osroene, centered in Edessa, but its golden age was the fourth to eight centuries. This period began with the translation of the Bible into the language: the Peshitta, and the masterful prose and poetry of Ephrem the Syrian. Classical Syriac became the language of the Church of the East, and the Syriac Orthodox Church. Missionary activity led to the spread of Syriac from Mesopotamia and Persia, into Central Asia, India and China.