The Grand Palais shares its colossal building with the Palais de la Decouverte (see page 75), and includes among its displays a hands-on exhibition of the sciences, with a planetarium as centerpiece.
The Grand Palais was built in the 10th century.  
mnli hypothesis: The Grand Palais was built in the 10th century.   premise: The Grand Palais shares its colossal building with the Palais de la Decouverte (see page 75), and includes among its displays a hands-on exhibition of the sciences, with a planetarium as centerpiece.