With elegant black and tan keys, it looks just like a baby grand piano. But when the instrument's keys are stuck, they release the distinctive sound of a cello. The remarkable creation is the viola organista - which was originally designed by Leonardo da Vinci in the late 15th century, but never built. Now, hundreds of years later, it has come to life thanks to a Polish concert pianist with a flair for making instruments. Scroll down for video Instrument: Polish musician Slawomir Zubrzycki has created a Viola Organista - which looks like a piano but sounds like a cello - based on a late 15th-century design by Leonardo da Vinci
@highlight
Viola organista originally designed by Leonardo da Vinci in the late 15th century - but there is no historical evidence to suggest it was ever built
@highlight
Polish musician Slawomir Zubrzycki spent at least 5,000 hours and around £6,000 building the instrument, which plays the sound of a cello
@highlight
When a key is struck, a string hits a wheel that has been wrapped in horse tail hair - similar to a violin bow - that then emits a sound
@highlight
Instrument was debuted at Academy of Music in Krakow, Poland this week
@highlight
'It just gives you goose bumps,' one attendee said
There are no historical records indicating that @placeholder or anyone else built the