It was created in 1912 for the last Tsar of Russia Nicholas II as a gift to his mother the Dowager Empress Maria Fyodorovna.
[1] The egg's design commemorates the centenary of the Battle of Borodino during Napoleon's 1812 invasion of Russia.
[2] The egg is crafted out of yellow gold, with emerald panels, rubies and diamonds on its exterior.
The egg still has its "surprise", a six-panel miniature screen depicting in watercolor six regiments of which Maria Fyodorovna was an honorary colonel.
[3] From 2007 until 2011, the Cheekwood Botanical Garden and Museum of Art in Nashville, Tennessee was selected to house the collection.