Complex sentence: He maintained residences on Long Island and in London and a chateau in France outside of Paris, but he preferred living in Salt Lake City, where he developed a large tract of downtown, trying to shift the center of town four blocks south from Temple Square.
Split into simpler sentences: He maintained residences on Long Island, New York and in London and a chateau in France. He preferred living in Salt Lake City, where he developed a large tract of downtown, trying to shift the center of town four blocks south from Temple Square.