Emil Rothengatter was a German-born artist and designer of circus posters who worked in cities including Philadelphia, Pennsylvania, and Cincinnati, Ohio. In 1896 he won a contest to design the flag of Cincinnati for a work he called “Zero of Burnet Woods.” However, controversy over whether Cincinnati should have a flag delayed the design’s formal adoption until 1940. Emil Rothengatter also wrote a book entitled Art of Poster Making in the United States, published in 1911. He died in New York.