What is classical music about?

Asking what is about classical music is a very broad question. Classical music usually has to do with orquestras, chamber music, chorales, and solo istrumental works. There are different eras in classical music in which the music portrays a different philosophy or feelings. The most common eras are the baroque(1500s-) with composers like J.S Bach. Classical(1700-) with composers like Mozart and Beethoven. Romantic (1800s-) With composers like Rachmaninoff, Chopin, Liszt, Brahms, Puccini. Modern or Impressionists( 1900s-) composers like Claude Debussy, Maurice Ravel, Prokofiev, Rimsky Korsakov, Igor Stravinsky. Contemporary( Alive Composers) like Mason Bates, John Cage, Carl Vine, Philip Glass.