1904 St. Louis Exposition in St. Louis, Missouri, where Lee Lawrie trained with his guidance, and the 1915 Panama–Pacific International Exposition held in San Francisco, California. In 1906/1907, he presided over the National Sculpture Society. Among the awards won by Bitter were the silver medal of the Paris Exposition, 1900; the gold medal of the Pan-American Exposition, 1901; a gold medal at Philadelphia, 1902; and the gold medal at the St. Louis Exposition, 1904. He was a member of the National Institute of Arts and Sciences, vice-president (1906–08 and 1914–15); the National Academy of Design, to which he was elected in 1902; the American Academy of Arts and Letters, Players' Club, Century Club, and vice-president of the Architectural League from 1904 to 1906 and from 1909 to 1911, and member of the Art Commission, New York, from 1912 to 1915. Although Bitter arose out of the Classical/Naturalist styles he was increasingly turning towards a more modern approach to sculpture. Much of the work in Buffalo and St. Louis was allegorical in nature. Where this would have taken him will never be known, because he was killed in an accident in 1915 when, while leaving the Metropolitan Opera in New York, a car jumped the curb on Broadway and struck him down. His wife survived the accident as he had pushed her out of the way of the oncoming car. Like many of the sculptors and painters of the day, Bitter frequently employed the services of the muse and history's first "super model", Audrey Munson. On June 30, 1901, he married Marie A. Schevill, of Cincinnati, Ohio. They had three children: Francis T. R. Bitter, Marietta C. E. Bitter and John F. Bitter. Their son Francis Bitter, born in 1902, became a prominent American physicist. For a time, Bitter's studio was located in a building known as The Castle in Weehawken, New Jersey. The Castle was created as a part of the Eldorado Amusement Park. Architectural sculpture East Doors and Tympanum, Trinity Church, New York, 1891 Elements Controlled and Uncontrolled, 1893, Administration Building, World's Columbian Exposition, Chicago, Illinois, destroyed Broad Street Station, 1894, Pennsylvania Railroad, Philadelphia, Frank Furness architect: Spirit of Transportation (plaster), length: 30 ft (9.14 m), interior of waiting room. Now located in 30th Street Station. Elements of Fire and Water Tamed and Harnessed in Service to Man, pediment over 15th Street tunnel, (terra cotta), length: 50 ft (15.24