This is a museum dedicated to the display of Arab culture in Paris. There are nine floors. Apart from the exhibition hall which occupies three floors, the other six floors are all research centers. At the bottom there is a spherical plane map made in Venice from 1448 to 1459. It is very beautiful. It comprehensively covers the human understanding of the cosmic structure and the world before the beginning of the great navigational era in the Middle Ages. It is of great scientific and historical significance.