Shāh Chérāgh (شاه چراغ) "King of the Light" is a mausoleum and mosque in Shiraz, Iran,
built around 1130 AD, housing the tomb of the brothers Ahmad and Muhammad, sons of Mūsā al-Kādhim (7th Imam of Twelver Shia Islam). The two took refuge in the city during the Abbasid persecution of Shia Muslims.
The tombs became celebrated pilgrimage centres in the 14th century when the pious and art-loving Queen Tashi Khatun erected a mosque and theological school by the tombs. After carrying out essential repairs, the queen ordered the tomb to be covered with millions of pieces of colored glass that glitter in the light and magnify its brilliance a thousand times.