Demak Great Mosque is the oldest mosque in Java. It was built by walisongo. It has an ancient and unique architecture design; it is truly traditional Indonesian building. The roof of the mosque has 3 levels, philosophically it tells about the levels of human life in Islam; (1) Faith, (2) Islam, (3) Ihsan. In the main gate, there is Prasasti Sengkolo telling Nogo Mulat Saliro Wani which means the years 1338 saka (Javanese calendar) or 1466( international calendar) or 887 (Islamic calendar). It was the year when the first stone placed. Demak Great Mosque is the starting point of the Glagahwangi Bintoro Kingdom.