Why is Mozart’s Symphony No. 41 called the Jupiter Symphony?

Wolfgang Amadeus Mozart’s Symphony No. 41 is nicknamed the "Jupiter" due to its good humor, exuberant energy, and unusually grand scale, which befit the chief god of the ancient Roman pantheon.1

The nickname was not given by Mozart himself; it was allegedly coined by the German musician and impresario Johann Peter Salomon and likely appeared in print for the first time in a London concert program in 1821.12

Musically, the work is considered the largest and most complex of Mozart’s symphonies. It summarizes the tradition of C-major symphonies—often associated with military pomp and ceremony—while transcending them through its profound expression, the assimilation of opera buffa style, and a sophisticated finale that incorporates complex fugal procedures.12