Complex sentence: The building was designed in the popular Romanesque style and was built of New York brownstone, and was intended to be "a romantic version of a medieval castle", with turrets, fanciful carving, and other flourishes.
Split into simpler sentences: The building was designed in the Romanesque style and was built of New York brownstone. It was intended to be "a romantic version of a medieval castle", with turrets, fanciful carving, and other flourishes.