Complex sentence: No less extravagant was the exterior, which combined elements of the Beaux-Arts, Italian Renaissance, and neoclassical styles; the whole was surmounted by an over-lifesized statue of Apollo playing his lyre.
Split into simpler sentences: No less extravagant was the exterior, which combined elements of the Beaux-Arts, Italian Renaissance, and neoclassical styles. The whole was surmounted by an larger than life statue of Apollo playing his lyre.