Complex sentence: The cast was also compared to the "Mona Lisa", and other famous paintings and sculptures so much that, in the following years, copies of the mask became fashionable figures in Parisian Bohemian society.
Split into simpler sentences: The cast was also compared to Mona Lisa, and other famous paintings and sculptures. So in that in the following years, copies of the mask became a fashionable figure in Parisian Bohemian society.