Shah Jahan’s Throne, Thakt-e-Taaos تخت طاؤس or Peacock Throne is one of the most famous and most valuable throne is the history. According to The History Channel, the throne would be worth $1 billion today. http://en.wikipedia.org/wiki/Peacock_Throne
Nadir Shah invaded India in 18th century and took the throne with him to Iran. Most people do not know what happened to the throne. One popular belief is that it is destroyed during war. (http://www.britannica.com/EBchecked/topic/447845/Peacock-Throne, http://en.wikipedia.org/wiki/Peacock_Throne).
But, a similar throne is present in Topkapi Museum, Istanbul. The throne was a gift to the Ottoman king by Nadir Shah. Is it the original throne or its copy?
The webpage http://www.internetstones.com/thrones-iranian-crown-jewels.html compares the description of two thrones and proposes that the throne in Istanbul is not the real Peacock Throne, but a copy of it. (The copy too was made in India.)