the main floor and the four levels of balconies make five floors in all; the number "5" represents the five pillars of islam and also pancasila, staircases at the corners of the building give access to all floors. the main hall is reached through an entrance covered by a dome 8 meters in diameter; the number 8 symbolizes august, the month of indonesian independence. the interior design is minimalist, simple and clean-cut, with a minimum of stainless steel geometric ornaments. the 12 columns are covered with stainless steel. on the main wall on qibla there is a mihrab and minbar in the center. on the main wall, there is a large metalwork in arabic calligraphy, spelling the name of allah on the right side and muhammad on the left side, and also calligraphy of surah thaha 14th verse in the center. the metalworks, stainless steel covers and ornaments were imported from germany. originally, as in the national monument nearby, the white marbles were planned to be imported from italy. however to cut costs and support the local marble industry, it was later decided that the marbles would be from tulungagung marble quarries in east java instead.