Leonardo’s Odd Piano Is Heard 500 Years Later

The flat bed of its interior is lined with golden spruce. Sixty-one gleaming steel strings run across it, similar to the inside of a baby grand.
Each is connected to the keyboard, complete with smaller black keys for sharp and flat notes. But unlike a piano, it has no hammered dulcimers. Instead, there are four spinning wheels wrapped in horse-tail hair, like violin bows.