Avesta is the holy book of Zoroastrianism. It has been written in Avestan language. The Avesta is also translated into other languages including Farsi and English. The oldest portion, the Ghathas,are the religious songs produced by Zarathushtra himself. Other parts of Avesta are named Yasna,Yashts,Visperad,Vendidad and Khordeh Avesta. There are two other religious texts in Zoroastrianism which are named Denkard and Ardaviraf Namak. Zoroaster composed the most important portion of this book, the Gathas.