early 17th c, si-o-seh pol, also known as allahverdi khan bridge, in isfahan, iran is made up of 33 arches in a row and

abbas allahverdi ancient arch architecture arid attraction brick bridge chubi column cross curve dry engineering esfahan historic history iran iranian isfahan islam khaju khan muslim nature persia persian pol river riverbed sculpture shahrestan sioseh sky structure tourist travel water yellow zayandehroud