Bobbins and Bowties
I have promised some time ago to describe, in separate posts, the different iwans at Esfahan’s Masjed-e Jomeh. I have discussed the southern and western iwans but political turmoil after the presidential election has largely dampened my enthusiasm of reporting on Iran’s glorious past. What has attracted my interest on the occasion of my last visit of Esfahan were some dazzling tessellations on the Darb-i Imam (1453 CE) and on the western iwan of Esfahan’s Great Mosque (about the same time) which have caused considerable discussions in the academic world. It had even been speculated whether they represent early examples of quasi-periodicity. You may find more information on it here and here . What is evident is that these complicated tilings frequently with five-fold ornament (decagons and pentagons) must have been composed of certain units which have been called girih tiles. They have conventional decoration ribbons with internal angles of multiples of 36°. You may find them in deco...