Complex sentence: The shed was taken off on August 15,1867, in time for the Paris Universal Exposition, so visitors and Parisians could see the glorious new building; but the inside was not finished until 1875, after the fall of the Empire in 1870.
Split into simpler sentences: The shed was taken off on August 15,1867, in time for the Paris Universal Exposition. Visitors and Parisians could see the glorious new building, but the inside was not finished until 1875, after the fall of the Empire in 1870.