Go immediately to this museum. It's free.
After undergoing extensive renovation the grand opening yesterday revealed a whole new look, new, and elegant. You may half-forget you're walking through a museum. If someone were to arrange a musical collection in their (grand) home they might take inspiration from this graceful display of pianos, instruments, manuscripts and photography. The whole collection feels quite personal, several pianos have been played by the likes of Schuman and Bach, and there's nothing like seeing one of Mozart's private letters. To top it all off the museum is located in the fantastic Landmark Center, a must visit St. Paul site.