Abu Rayhan Muhammad ibn Ahmad al-Biruni, known as al-Biruni was a Khwarazmian Iranic scholar and polymath during the Islamic Golden Age. He has been called variously "Father of Comparative Religion",
An imaginary rendition of Al Biruni on a 1973 Soviet postage stamp
An illustration from al-Biruni's astronomical works in Persian, explains the different phases of the Moon, with respect to the position of the Sun
Four directions and political divisions of Iran by Abū Rayḥān al-Bīrūnī
The statue of Al-Biruni in United Nations Office in Vienna
The Ziyarid dynasty was an Iranian dynasty of Gilaki origin that ruled Tabaristan from 931 to 1090 during the Iranian Intermezzo period. The empire rose to prominence during the leadership of Mardavij
Minaret of the Tarik Khane mosque, Damghan, Ziyarid dynasty, 1026‒1032.
Manuchihr addresses his assembled people and army. Folio from a Tarikhnama (Book of history) by Balami, early 14th century.
Persia with part of the Ottoman Empire, 1872