the rectangular main prayer hall building is covered by a 45-m diameter central spherical dome; the number "45" symbolizes the 1945 proclamation of indonesian independence. the main dome is adorned with a stainless steel ornamental pinnacle in the form of a crescent and star, the symbol of islam. the smaller secondary dome is also adorned with a stainless steel pinnacle with the name of allah (god) in islamic calligraphy.