The Armenian alphabet is derived from the Iranian Pahlavi script that, according to the Armenian historian Mozes Chorenatsi, was generally adopted in Armenia since the 4th century. He attributes the invention of the Armenian script to the holy Masjtot, secretary to the court of the Armenian kings, who had a thorough knowledge of the different forms of the Iranian script. Of this script he derived the Armenian alphabet. He was most probably influenced by the Greek script. The Old Armenian script had 36 signs, while the current Armenian only uses 22, written from left to right.