Ziloo is one of the oldest handicrafts of Yazd city which dates back to centuries before Islam. In his travelogue, Naser-khosro, the famous Iranian poet, mentions the existence of about 500 workshops of Ziloo making only in the city of Toon which is in East Iran. In Hodud-al-Alam (the first Persian book of geography) Persian Ziloo is recorded as one of the most important floor coverings in mosques in Iran four centuries after the rise of Islam. This carpet which is made of cotton threads, although very simple in appearance, yet enjoys complicated technics which reflect the rich culture and thought of the people making it. This carpet is similar to straw mats in the way it is woven and the motifs used to decorate it. The word Xylography, meaning engraving on wood in English, has roots in the word Ziloo.