801-4266 - Caligraphy Roundels Naming Hasan, grandson of Mohammed (left) and Caliph Ali (right). Tourists Viewing from the Gallery, Interior, Hagia Sophia Grand Mosque, 537 AD, UNESCO World Heritage Site, Sultanahmet, Istanbul, Turkey

832-165086 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165105 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165099 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165093 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165113 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165094 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165091 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165089 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165101 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165106 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165109 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165085 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165095 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165084 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

832-165107 - Ruins of Medina Azahara, palace built by Caliph Abd al-Rahman III, Cordoba, Andalusia, Spain, Europe

391-6245 - Qusayr Amra, Umayyad bath complex, Jordan, Middle EastBuilt in the desert by Caliph Walid I, 700-715, contains well preserved period frescos

391-6240 - Frescos of artisans on side aisle ceiling, Qusayr Amra, Umayyad bath complex, Jordan, Middle EastBuilt in the desert by Caliph Walid I, 700-715, contains well preserved period frescos

765-144 - Caliph's palace, Samarra, Iraq, Middle East

765-143 - Caliph's palace, Samarra, Iraq, Middle East

765-145 - Caliph's palace, Samarra, Iraq, Middle East

120-4629 - Fresco of carpenters, within panels decorating vaulted ceiling of main audience chamber, Qasr Amra hunting lodge and baths, built by Ummayad Caliph Wallid I between 705 and 715AD, east of Amman, Jordan, Middle East