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Ancient Greeks, who believed their instruments were gifts from Athena, Hermes, and Pan.
Answer:
Throughout the late 1940's and 1950's, MGM became the king of the movie musical. And this was largely due to the "Freed Unit." Freed's productions became so popular that the studio could afford to have a SECOND unit for musicals under the direction of Joe Pasternak.
art that does not portray figures or objects; art without real models or subject ... on formal elements (the visual elements, design principles) to carry its message ... elements, such as a line, shape, color, texture, that are used by artists to create imagery ... using a series of closely spaced parallel lines to achieve a similar effect.