Complex sentence: The committee was initially installed in the apartments Marie-Antoinette, situated on the first floor of the Palais des Tuileries however the body, bit-by-bit, overtook the offices of Louis XVI.
Split into simpler sentences: The committee was installed in the apartments Marie-Antoinette, situated on the first floor of the Palais des Tuileries. This body, bit-by-bit overtook the offices of Louis XVI.