13. The Cornwall Duchy
Location: England’s Cornwall
Completed Cost: $1.3 billion *
Completed Year: 1337
Founded in 1337, the Duchy of Cornwall is valued at over $1 billion for the Prince of Wales and his kin. It is one of the two duchies in England held by the Royal Family, and it provides funding for the Prince’s public, private, and charity endeavors. Among the world’s best-managed private estates is the Duchy.
Cornwall’s Duchy Copyright Chris Jackson/Mozilla
It was first established by King Edward III, who gave a charter to his son Prince Edward to give the prince his independence. The Duchy has carried on operating in essentially the same manner for generations, passing down information from one generation to the next.
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