This 12th-century mosque, still in use today, was first built under Ala’oddoleh Garshasb of the Al-e Bouyeh dynasty. Situated adjacent to the center of the city of Yazd, the complex of the Jame mosque of Yazd was founded in the twelfth century; however, what stands on the site today is the new mosque (masjid-i jadid) built in 1324 under the Il Khanids, and later augmented in 1365 under the Muzaffarids.
During the eighteenth and nineteenth centuries the mosque underwent further developments that added to its medieval nucleus. These multiple historical layers are most evident in the courtyard: to the east are the ruins of an early, pre-Saljuk mosque; to the south are fourteenth-century structures, and to the west are late eighteenth and nineteenth-century additions.
According to the historians, this mosque was constructed in the site of the Sassanid fire temple and Ala’oddoleh Garshasb commenced building the charming mosque. The previous mosque was constructed by order of Ala’oddoleh Kalanjar in 6th century A.H., however the main construction of the present building was done by order of “Seyyed Rokn Al-din Mohammad QAZI”.
The mosque is a fine specimen of the Azari style of Persian architecture which is crowned by a pair of minarets, the highest in Iran, and the portal’s facade is decorated from top to bottom in dazzling tile work, predominantly blue in color. Within is a long arcaded courtyard where, behind a deep-set south-east Iwan, is a sanctuary chamber (Shabestan). This chamber, under a squat tiled dome, is exquisitely decorated with faience mosaic: its tall faience Mihrab, dated 1365, is one of the finest of its kind in existence.