P. T. Barnum in the context of "Barnum's American Museum"

Bridgeport is the most populous city in the U.S. state of Connecticut and the fifth-most populous city in New England, with a population of 148,654 in 2020. Located in eastern Fairfield County at the mouth of the Pequonnock River on Long Island Sound, it is a port city 60 miles (97 km) from Manhattan and 40 miles (64 km) from The Bronx. It borders the towns of Trumbull to the north, Fairfield to the west, and Stratford to the east. Bridgeport and other towns in Fairfield County make up the Greater Bridgeport Planning Region, as well as the Bridgeport–Stamford–Norwalk–Danbury metropolitan statistical area, the second largest metropolitan area in Connecticut. The Bridgeport–Stamford–Norwalk–Danbury metropolis forms part of the New York metropolitan area.

Inhabited by the Paugussett Native American tribe until English settlement in the 1600s, Bridgeport was incorporated in 1821 as a town, and as a city in 1836. Showman P. T. Barnum was a resident of the city and served as the town's mayor (1871). Barnum built four houses in Bridgeport and housed his circus in town during winter. The city in the early 20th century saw an economic and population boom, becoming by all measures Connecticut's chief manufacturing city by 1905. Bridgeport was the site of the world's first mutual telephone exchange (1877), the first dental hygiene school (1949), and the first bank telephone bill service in the US (1981). Inventor Harvey Hubbell II invented the electric plug outlet in Bridgeport in 1912. The Frisbie Pie Company was founded and operated in Bridgeport. The world's first Subway restaurant opened in the city's North End in 1965. After World War II, industrial restructuring and suburbanization caused the loss of many large companies and affluent residents, leaving Bridgeport struggling with issues of poverty and violent crime.

The Fiji mermaid (also Feejee mermaid) was an object composed of the torso and head of a juvenile monkey sewn to the back half of a fish. It was a common feature of sideshows where it was presented as the mummified body of a creature that was supposedly half mammal and half fish, a version of a mermaid. The original had fish scales with animal hair superimposed on its body and pendulous breasts on its chest. The mouth was wide open with its teeth bared. The right hand was against the right cheek, and the left tucked under its lower left jaw. This mermaid was supposedly caught near the Fiji Islands in the South Pacific. Several replicas and variations have also been made and exhibited under similar names and pretexts. P. T. Barnum exhibited the original in Barnum's American Museum in New York in 1842, but it then disappeared—likely destroyed in one of the many fires that destroyed parts of Barnum's collections.

The Ringling Bros. and Barnum & Bailey Circus, also known as the Ringling Bros. Circus, Ringling Bros., the Barnum & Bailey Circus, Barnum & Bailey, or simply Ringling, is an American traveling circus company billed as The Greatest Show on Earth. It and its predecessor have run shows from 1871, with a hiatus from 2017 to 2023. They operate as Ringling Bros. and Barnum & Bailey. The circus started in 1919 when the Barnum & Bailey's Greatest Show on Earth, a circus created by P. T. Barnum and James Anthony Bailey, was merged with the Ringling Bros. World's Greatest Shows. The Ringling brothers purchased Barnum & Bailey Ltd. in 1907 following Bailey's death in 1906, but ran the circuses separately until they were merged in 1919.

After 1957, the circus no longer exhibited under its own portable "big top" tents, instead using permanent venues such as sports stadiums and arenas. In 1967, Irvin Feld and his brother Israel, along with Houston judge Roy Hofheinz, bought the circus from the Ringling family. In 1971, the Felds and Hofheinz sold the circus to Mattel, buying it back from the toy company in 1981. Since the death of Irvin Feld in 1984, the circus has continued to be a part of Feld Entertainment, an international entertainment firm headed by his son Kenneth Feld, with its headquarters in Ellenton, Florida.

Carl Hagenbeck (10 June 1844 – 14 April 1913) was a German merchant of wild animals who supplied many European zoos, as well as P. T. Barnum. He created the modern zoo with animal enclosures without bars that were closer to their natural habitat. He was also an ethnography showman and a pioneer in the display of members of "savage tribes" in Völkerschauen, known nowadays in English as "ethnic shows" or "human zoos". These racist displays were controversial at the time and are now widely considered unethical. The transformation of the zoo architecture initiated by him is known as the Hagenbeck revolution. Hagenbeck founded Germany's most successful privately owned zoo, the Tierpark Hagenbeck, which moved to its present location in Hamburg's Stellingen district in 1907.

William H. Mumler (1832–1884) was an American spirit photographer who worked in New York City and Boston. His first spirit photograph was apparently an accident—a self-portrait which, when developed, also revealed the "spirit" of his deceased cousin. Mumler then left his job as an engraver to pursue spirit photography full-time, taking advantage of the large number of people who had lost relatives in the American Civil War. His two most famous images are the photograph of Mary Todd Lincoln with the ghost of her husband Abraham Lincoln and the portrait of Master Herrod, a medium, with three spirit guides. Mumler was eventually taken to court and tried for fraud and larceny. Noted showman P. T. Barnum testified against him. He was later acquitted by a judge, and his photography career continued.

Mumler's photographs are recognized as fakes but they circulated widely during the last quarter of the 19th century and were marketed as objects of belief and visual curiosities both within and beyond the spiritualist movement. He later discovered a process, called the "Mumler Process", by which photo-electrotype plates could be produced and printed more easily.