Complex sentence: A double flight of white marble stairs leads to the main entrance on the south façade and after passing though the grand doors there is an uninterrupted view of the entire 35-meter length of the great hall.
Split into simpler sentences: A double flight of white marble stairs leads to the main entrance on the south façade. After passing though the grand doors, there is an uninterrupted view of the entire 35-meter length of the great hall.