He was buried under the palace of Humayd ibn Qahtaba. Thus the Dar al-Imarah was known as the Mausoleum of Haruniyyeh. In 818, Ali al-Ridha was martyred by al-Ma’mun and was buried beside the grave of Harun. Although Mashhad owns the cultural heritage of Tus (including its figures like Nizam al-Mulk, Al-Ghazali, Ahmad Ghazali, Ferdowsi, Asadi Tusi, and Shaykh Tusi), earlier Arab geographers have correctly identified Mashhad and Tus as two separate cities that are now located about 19 kilometres (12 miles) from each other.