Baba Ghassem Mausoleum is a historical mausoleum in Isfahan, Iran. It dates back to the 14th century. It is well known for its beautiful mihrab and dome. It is located to the north of Jameh Mosque of Isfahan. It was repaired and revamped in the Safavid era. Baba Ghassem was one of the prominent faqihs in Isfahan. One of his devotees built the Emamieh school for him, when Baba Ghassem was alive and after Baba Ghassem’s death he built this mausoleum for him. The tomb has brick and tile decorations. Its dome is pyramidical. This mausoleum was very respected in the past, so that people swore to it beside the tomb for proving that they are telling the truth. On the below part of the dome of the sructute, one of the names of Allah has been written in the Bannai script.