Bernhardt Emil Muller, usually known as Bernhardt E. Muller, was an American architect who worked chiefly in Florida, where he designed many buildings in the 1920s and 1930s that have been listed on the National Register of Historic Places. He is known for "the distinctive architecture loosely described as the 'Arabian Nights style,' or more specifically but still rather loosely, the Moorish Revival Style." Many of his works are in the Opa-locka Thematic Resource Area, located in Miami-Dade County.