A is for the Armoury Chamber Museum. Located in the Kremlin on Moscow, Russia, it was built between 1844 and 1851. The architecture is just incredible, situated as it is next to the Grand Kremlin Palace.
Here is an egg that was in the collection I saw several years ago. It is the Imperial Peter the Great Egg from 1903 and is in the Virginia Museum of Fine Arts. I learned at one of the exhibits I attended that the Faberge eggs in the hands of private US and other foreign citizens are a result of Lenin selling them off to pay bills after the Revolution. Maybe that is where the Detroiters who wanted to sell the DIA art got the idea.
Tolkien Bonus: A is for Aragorn II, the heir of Isildur. After the defeat of Sauron in the War of the Rings, he became the King of the Reunited Kingdom. He married Arwen, daughter of Elrond.