Perhaps no other treasury in Europe is a bigger testament to the power and influence of royalty and its regalia than the Imperial Treasury at Austria's Hofburg Imperial Palace. A whopping 21 rooms, the Imperial Treasury stores riches beyond what any man can imagine. From crowns to jewels, to weapons, every single object stored in these rooms were collected by the House of Habsburg, and each of them is invaluable. Amassed over 800 years, the collection of treasures here is even said to include the horn of a unicorn!