Simplify the following text for a Grade 11 native English-speaking person.
Original: Following a series of regime changes in France , it became the Imperial National Library and in 1868 was moved to newly constructed buildings on the Rue de Richelieu designed by Henri Labrouste .
Simplified: Following a series of regime changes in France , it became the Imperial National Library and in 1868 it moved to new buildings on the Rue de Richelieu .