"He fancied himself an engineer before he fancied himself an artist, and the evidence is in his drawings," says Richard Reyes-Gavilan.

US capital hosts 12 'beautiful, glowing' Leonardo da Vinci sketches for the first time

The city of Washington, DC is hosting 12 original sketches and drawings by Leonardo da Vinci that illustrate the Renaissance master’s interests and research into fields including geometry and physics.