Although it has had a number of renovations, it is thought to be largely in its original form. It is a classic example of a traditional Javanese mosque. Unlike mosques in the Middle East it is built from timber. Rather than a dome, which did not appear on Indonesian mosques until the 19th century, the roof is tiered and supported by four saka guru teak pillars. The tiered roof shows many similarities with wooden religious structures from the Hindu-Buddhist civilizations of Java and Bali. The main entrance of Masjid Agung Demak consists of two doors carved with motifs of plants, vases, crowns and an animal head with an open wide-toothed mouth. It is said that picture depicts the manifested thunder caught by Ki Ageng Selo, hence their name Lawang Bledheg (the doors of thunder). Like other mosques of its era, its orientation towards Mecca is only approximate.
