What is inside the Kaa'bah?

" -there are two pillars inside (others report 3 pillars)
" -there is a table on the side to put items like perfume
" -there are two lantern-type lamps hanging from the ceiling
" -the space can accommodate about 50 people
" -there are no electric lights inside
" -the walls and floors are of marble
" -there are no windows inside
" -there is only one door
" -the upper inside walls of the Kaa'bah were covered with some kind of curtain with the Kalimah written on it.