In this article the Ground Mosque in Akhisar is introduced in details not presented before. The Mosque is part of the complex. At present the Mosque and cemetery (hazire) are all that remain of this complex.The Grand Mosque was built with the remains of the church built previously in the same area. The mosque has a central planned main hall (harim), a minaret which is north of the main hall, and the place of the last congregation which was built later. The main hall, originally the square area in the middle, was extended by additions to the east and west. The middle unit was covered by one big dome. Each of the side units was covered by three small domes.Based on the architectural characteristics and style of the plan, it appears that Akhisar Grand Mosque was built in the late fifteen century. The mosque can be described as an unsuccessful example of central domed plan. There is no wholeness of the interior area or organic attachment between the central area in the middle and the side units. However it is an important example of a central domed planned experiment. This plan reached its peak in Ottoman architecture.

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