Why is Mozarts Symphony No 41 called the Jupiter Symphony?
Although Mozart himself did not name this “Jupiter”, but possibly Johann Peter Salomon. He named it such because in the last two minutes of the symphony, a five-part fugato is played, which at that point had not been done due to its immense complexity (even Bach had only done a three-part fugato). No person can process the five melodies simultaneously, so Salomon thought surely only a great god such as Jupiter could hear this majestic piece.