Origins and sources of jazz, the story how jazz has transformed into one of the most interesting style in the history of music.
There's something about Scott Joplin. He seems to be deeply ingrained into me. Somehow I knew these melodies long before I'd ever discovered him. He definately survived the last century and I'm sure he'll survive many to come. Ragtime piano maestro.
Ugh, why does the Entertainer have to be at the top? There are SO many better ones. Magnetic Rag, The Ragtime Dance, The Chrysanthemum....
Also, if you like Joplin, you may want to check out some of the non-ragtime stuff he's done. Search youtube for "Treemonisha Overture". It's pretty awesome.