Before starting lecture 9 lets do the summery of our previous lecture: Islamic glass work, Medieval Islamic metalwork, calligraphy, calligraphy in different cultures and traditions of the world, calligraphy in Japan, calligraphy in China, calligraphy in Persia, Arabic calligraphy. In this lecture we will focus Persian artists and their calligraphy. Persian calligraphy is the calligraphy of the Persian writing system. It is one of the most revered arts throughout Persian history.