Standing four-feet tall, this doll is made of 2,340 gilt or polished-steel parts and took 12 workers in a Swiss shop roughly 15,000 hours to craft.
Its motions are operated by spring-driven cogs and gears to make up for a lack of motor or electrical power source. The piece features 62 birds that move in tune with the flute's rendition of Georges Bizet's "Marche de Rois."
Draped in exquisite Renaissance garb and adorned with gold and pearls, L'Oiseleur is considered the most expensive doll in the world with an estimated value of $6.25 million..