“Why did you build such a long piano?”

Inside a piano, the bass strings are wrapped with copper wire to deepen the sound without needing more length. In 2004, Adrian Alexander Mann wondered how long would the bass strings have to be without the copper wire to hit the right notes. His piano teacher had no idea, so the 15-year-old Adrian decided to figure it out himself.

The Alexander Piano is 18ft 9 inches, weighing over a metric ton and is the world’s largest single keyboard grand piano.

When Adrian Alexander Mann started building the Alexander Piano he was 16 years old and completed it on the 24th October 2009 when he was 20.