Long before the establishment of the Great Mosque of Demak by Raden Fatah, in that location before the building Glagahwangi Pondok Pesantren Sunan Ampel under the care of Yang was founded in 1466, besides functioning as a boarding school as well as a mosque.
Establishment of the Great Mosque of Demak by Raden Fatah with the Guardians on the record in the machinations of a pictorial inscription is Condro Sengkolo Memet, with the meaning Sariro Quiet Kiblating meaningful Gusti in 1401 Saka. Figure machinations of the head which means the numbers 1 (one), leg 4 means the number 4 (four), the agency machinations means the number 0 (zero), the tail struck means that digits 1 (one). Can be concluded, the Great Mosque of Demak was founded in 1477 AD or 1401 Saka
In 1477, the mosque was rebuilt as a mosque Duchy Glagahwangi Demak. In 1478, when Raden Fatah I was appointed as the Sultan of Demak, the mosque was renovated with the addition of three traps. Raden Fatah together Walisongo mosque to lead the development process is assisted by the surrounding community.
The guardians share their respective duties. In general, the trustees worked on the pillar of the main pillars supporting the mosque. However, there are four guardians that specifically led the manufacture of other pillar, namely: Sunan Bonang lead to pillar in the northwest; Sunan Kalijaga make a pillar in the northeast; Sunan Ampel make a pillar in the southeast, and Sunan Gunungjati make cornerstone in the southwest.
