Erected in 1921-22, this building housed the offices of Magnolia Petroleum Co., later Mobil Oil Co. It was designed by Sir Alfred C. Bossom (1881 - 1965), noted British architect, and built at a cost of $4 million. The tallest structure in Dallas for almost 20 years, it reflected the city's increasing economic importance. In 1934 a revolving neon sign was placed atop the building. The "flying red horse," trademark for Magnolia products, quickly became a local landmark. RTHL - 1978