Miss Susan Barton: the mammoth lady, as exhibited at Barnum's American Museum, New York 1849, weight 576 pounds

The invention of lithography at the turn of the 19th century opened a new world for bird illustrators. It brought many advantages to the artist — ease of use, a softness of line, and a new freedom to effect bold designs with a wide range of light and dark tones. Most of the fine ornithology books of the 19th century were prepared in folio format with hand-colored lithographic plates. The lithographic process is one of flat surface printing from a design drawn on stone. It is based on the principle of the resistance of grease to water. There are no raised or cut portions, as there are in engraving and etching. The image is drawn with greasy ink or chalk on a smooth stone, and the rest of the stone is treated with gum arabic and nitric acid. The gum retains the lines of the greasy design, which repels the water used in printing. Special paper and ink, as well as a special press, are needed to produce the prints. First used for bird illustration in 1820, lithography was widely adopted by the best artists of the century. The technique was popular because the artist could draw his own illustration directly on the lithographic stone. Prints could be made from the drawing with no intermediary such as an engraver. Accurately reproduced and then colored by hand, the resulting illustrations gave the impression of original watercolor paintings.

Hachaliah Bailey established one of the earliest circuses in the United States around 1806. Barnum, who as a boy had worked as a ticket seller for Hachaliah Bailey's show, had run the Barnum's American Museum from New York City since 1841. Barnum brought in to the museum animals to add zoo-like elements, and a freak show and took the Museum on road tours, named "P.T. Barnum's Grand Traveling American Museum". The latter show was named "P.T. Barnum's Great Traveling Museum, Menagerie, Caravan, and Hippodrome". The show combined elements of museum, menagerie, variety performance, concert hall, and circus", and considered it to potentially be "the Greatest Show on Earth", which subsequently became part of the circus's name. In the 1860s, The Cooper and Bailey Circus became the chief competitor to Barnum's circus. The two groups agreed to combine their shows in 1881 under name "P.T. Barnum's Greatest Show On Earth, And The Great London Circus, Sanger's Royal British Menagerie and The Grand International Allied Shows United", it was eventually shortened to "Barnum and Bailey's Circus". Bailey acquired Jumbo, advertised as the world's largest elephant, for the show that was touring the eastern United States and Europe. European tour started on December 27, 1897, and lasted until 1902 while dozens of small circuses toured the Midwest and the Northeast. Ringling brothers circus was one of them, it rapidly grew and soon started to move by train, becoming the largest traveling amusement enterprise of that time. Bailey's European tour gave the Ringling brothers an opportunity to move their show from the Midwest to the eastern seaboard. After Bailey died, the circus was sold to the Ringling Brothers in 1907. On March 29, 1919, "Ringling Bros. and Barnum & Bailey Combined Shows" debuted in New York City. The posters declared, "The Ringling Bros. World's Greatest Shows and the Barnum & Bailey Greatest Show on Earth are now combined into one record-breaking giant of all exhibitions." The circus flourished through the Roaring Twenties. The circus suffered during the 1930s due to the Great Depression, but managed to stay in business. During War, a special dispensation was given to the circus by President Roosevelt to use the rails to operate, in spite of travel restrictions imposed as a result of World War II. Many of the most famous images from the circus that were published in magazine and posters were captured by American Photographer Maxwell Frederic Coplan, who traveled the world with the circus. The Hartford circus fire occurred on July 6, 1944, in Hartford, Connecticut, during an afternoon performance that was attended by approximately 7,500 to 8,700 people. It was one of the worst fire disasters in the history of the United States. In the following investigation, it was discovered that the tent had not been fireproofed. Ringling Bros. had applied to the Army, which had an absolute priority on the material, for enough fireproofing liquid to treat their Big Top, but the Army had refused to release it to them. The post-war prosperity enjoyed by the rest of the nation was not shared by the circus as crowds dwindled and costs increased. Public tastes, influenced by the movies and television, abandoned the circus, which gave its last performance under the big top in Pittsburgh, Pennsylvania on July 16, 1956. In late 1967, Irvin Feld, Israel Feld, and Judge Roy Mark Hofheinz of Texas, together with backing from Richard C. Blum, the founder of Blum Capital, bought the company outright from North and the Ringling family interests for $8 million at a ceremony at Rome's Colosseum. The company was taken public in 1969. The circus's last performance was its "Out of This World" tour at Nassau Veterans Memorial Coliseum on May 21, 2017.