Becoming a model for Javanese mosques in the following period, the Great Mosque of Demak has main buildings and a veranda. Its architectural form is also very typical of Java. This is due to several factors, namely the builders of the buildings were local Muslims themselves, so that the art of building and even the art of carving that already existed traditionally was continued, such as the Great Mosque of Demak which was built by craftsmen brought in from Majapahit. In fact, the structure of the mosque's veranda was made from materials brought in from Majapahit (Tjandrasasmita, 2000: 164).

The main building has four main pillars called saka guru. One of the main pillars is believed to have come from wood chips (pieces) tied together called saka tatal. The veranda building is an open building. The roof is pyramid-shaped supported by eight pillars called Saka Majapahit. The pyramid roof of the mosque consists of three parts that depict; Faith, Islam, and Ihsan. To the east of the mosque, there is a tomb complex and museum. Inside the mosque museum, the “Pintu Bledheg” is kept, which contains the candra sengkala, Naga Mulat Salira Wani, which means the year 1388 Saka or 1466 AD, or 887 H. This door was made by Ki Ageng Selo who was known to have the skill of catching lightning. In addition, the museum also stores various things related to the history of the Great Mosque of Demak.

The tomb complex contains the tombs of the kings of Demak. The golden yellow tomb ledge without a roof and the most prominent is the tomb of Raden Patah (Sultan Demak I) and Raden Pati Unus (Sultan Demak II), while on the other side with a special building and roof, is the tomb of Sultan Demak III, Sultan Trenggana. The tomb of Sultan Demak III is in a locked roof and is only opened on certain days. This is to maintain cleanliness for visitors. Demak during the time of Sultan Trenggana is considered to have reached the peak of its glory by controlling Sunda Kelapa and Tuban in 1527, Madiun in 1529, Surabaya and Pasuruan in 1527, Malang in 1545, and Blambangan in 1546.

In the tomb complex, there are also tombs of other Demak figures, such as Putri Champa and Syaikh Maulana Maghribi, as well as the Tomb of Prince Benawa. The tomb of the latter figure is very unique, because the tomb's ledge is very long, longer than tombs in general. His tomb is separate from the tomb of the Sultan of Demak, because Prince Benawa was the son of Sultan Hadiwijaya (Jaka Tingkir), the founder of the Pajang Sultanate. His daughter, Dyah Banowati, married Mas Jolang (Panembahan Hanyakrawati), the son of Sutawijaya, and gave birth to Sultan Agung. There is also the tomb of Sunang Ngudung, the father of Sunan Kudus and the brother of Sunan Ampel. In the war against the remnants of Majapahit, he managed to kill Handayaningrat, Ki Ageng Pengging Sepuh and the son-in-law of Brawijaya V, whose tombs are in the Boyolali Regency area. Sunang Ngudung was later killed by Raden Kusen, Adipati Terung, a Muslim who was loyal to the Majapahit Kingdom. The tomb of Adipati Terung is also located in the tomb complex of the kings of Demak. Other important figures seen in the open tombs are the tombs of Prince Mecca and his wife, the tomb of Prince Sekar Sedolepen (father of Arya Panangsang) who was killed by Raden Mukmin's (younger name of Sunan Prawata) men, and the tomb of Arya Panangsang, ruler of Jipang Panolan.