Prof. R. SIti Rukayah with Ado and Indonesian Literature Lecturer M. Abdullah studied about lost of old Demak Sultanate City pattern. Demak was a transitional city from the Hindu/Buddhist-Islamic concept and coastal city to the inland concept. This research reveals that the problem of sedimentation on the coast causes the loss of the old city. Sedimentation caused the Demak sultanate (1478–1586) to no longer be on the coast and lose its power as a Maritime kingdom. The study can be accessed at 10.3846/jau.2023.17855 in the Journal of Architecture and Urbanism since 6th October 2023. JAU is an international journal indexed by scopus at Q2 in Architecure.