The mausoleum of Khayyam Nishaburi The mausoleum of sage Omar Khayyam Nishaburi, the Iranian philosopher, mathematician, astronomer, and poet, is in Nishabur close to the Imamzadeh Muhammad Mahroq mausoleum. This memorial, which is in the style of Seljuk towers (the time of Khayyam), has a iron structure covered with stones and decorated with tile-works and calligraphies of khayyam's four-line stanzas Architecturally speaking, the Khayyam's mausoleum is a unique building. It is 22 meters high and has been erected in 1962 AD by the national remain community