The New Testament has influenced religious, philosophical, and political movements in Christianity, and left an indelible mark on itsliterature, art and music. The New Testament is ananthology, a collection of Christian works written in the common Greek languageof the first century, at different times by various writers, who were earlyJewish disciples. In almost all Christian traditions today, the New Testament consists of 27 books. The original texts were written in the first and perhaps the second centuries of theChristian Era, generally believed to be inKoinè Greek, which was thecommon languageof theEastern Mediterraneanfrom theConquests of Alexander the Great(335-323 BC) until the evolution ofByzantine Greeks (c. 600). All of the works which would eventually be incorporated into the New Testament would seem to have been written no later than around AD 150.