The Round City of Baghdad was centrally planned as a residence of Abbasid Caliphs and its core was built in 762-766, in just 4 years. Pre-planned structures, both grand palaces and mosques as well as various commercial and residential buildings were designed by the best architects and craftsmen of Islamic world at a time. It took a shape of a circle with a radius of about 1 … [Read more...] about The lost Round City of Baghdad