The art music of several cultures most notably European, American, Arabic, Chinese, Indian and Japanese.The difference between popular music and classical are in there nature and composition. Classical often using intricate arrangements , professional trained singers and lush complex orchestral works.It does not only mean European art music from the first half of the 16th century to the late 19th century, thats called ethnocentrism and should be condemned along with the notion that people stopped making classical music in the 20th century. I suggest looking up Ludovico Einaudi, his work might not be so complex as Mozart but he plays the piano like a possesed man.I would like to note that i love classical music myself for its complexity and sheer utter beauty, but i condem most people who think its a way to be better then the common people . There are no common people there are only people who strive to be, and learn about themselves and those who fear what others think about them.And stop bitching about RAP, i do not like the music genre myself but you can not expect someone with a brain the size of a nut to comprehend anything more complex then simple beats and a stupid excuse for poetry. If you condemn something you are just showing how close minded you really are. For example Pink Floyd and early Metallica made music that is just as beautiful and complex as a lot of classical music pieces. You do not hear how complex Metallica is because your brain can not handle the speed at which it is played.