I remember learning how to play Handel's Passacaglia in G Minor on the piano. It was tricky (especially for me, with my limited skill), but a ton of fun.
This is also a ton of fun, but much better than listening to me play it. (Trust me on this one.)
Provided to YouTube by Sony Music Entertainment Passacaglia and Sarabande (with variations on a theme by Handel for violin and viola) · Itzhak Perlman / 帕爾曼 · Pinchas Zukerman / 祖克曼 Israel Philharmonic Orchestra 60th Anniversary Gala Concert ℗ 1997 BMG Music Released on: 1997-03-25 Violin: Itzhak Perlman / 帕爾曼 Viola: Pinchas Zukerman / 祖克曼 Composer: Johan Halvorsen Producer: Toine Mertens Producer: Stan Taal Auto-generated by YouTube.
Attribution(s): "Playing String Quartets" (by the ever-popular Anonymous) is in the Public Domain via Wikipedia.