A Persian Dervish. The old dervish's huge turban of green cloth (the color of the Prophet) is surmounted by tufts of black yak hair.

- Image ID: G15HGM
Science History Images / Alamy Stock Photo
Image ID: G15HGM
A Persian Dervish. The old dervish's huge turban of green cloth (the color of the Prophet) is surmounted by tufts of black yak hair.