Complex sentence: Mellie Esperson had the first of the two buildings constructed for her husband, Niels, a real estate and oil tycoon, and his name is carved on the side of the building, above the entrance, in large letters.
Split into simpler sentences: Mellie Esperson had the first of the two buildings constructed for her husband, Niels, a real estate and oil tycoon. His name is carved on the side of the building, above the entrance, in large letters.