This monument is the tomb of Muammad ibn Mohammad ibn Zeyd ibn Ali ibn Al-Hossein (A.S) which is situated in a beautiful garden in the precinct of Khayyam's tomb in Nishabur. This mausoleum has a tiled dome and high porticos. The grave of the Imamzade Muhammad

Mahrug is located under the dome. The tile inscription of the portico, the fretwork box and the entrance gate of the mausoleum are from the Shah Tahmaseb l era-the tenth century AH. This building, which had originally been a dome, is said to belong to Seljuk era. It has been completely repaired in Shah Tahmasb Safavi times and in shah Sultan Hossein Safavi era- 1119 A.H. The tomb of Imamzadeh Ibrahim, one of the sons of Imam Mosa ibn Ja'far (A.S.) is also located in this building.