How much did the Dutch pay for Manhattan?
According to the document by Pieter Janszoon Schagen our People (ons Volck), Peter Minuit and Dutch colonists acquired Manhattan in 1626 from unnamed American Indian people in exchange for trade goods worth 60 guilders, often said to be worth US$24, though (by comparing the price of bread and other goods) it actually ...
Source: http://en.m.wikipedia.org/wiki/Manhattan
2. Which American president married his cousin?
In 1905, Franklin Delano Roosevelt married Eleanor, his fifth cousin once removed. Eleanor did not have to change her name upon marrying, since her maiden name was also Roosevelt. Her father, Elliot, was the brother of former President Theodore Roosevelt.
Source: http://www.history.com/this-day-in-history/john-quincy-adams-son-marries-relative-at-the-white-house
3. How much is the Mona Lisa painting worth 2014?
Guinness World Records lists the Mona Lisa as having the highest insurance value for a painting in history. On permanent display at The Louvre museum in Paris, the Mona Lisa was assessed at US$100 million on December 14, 1962. Taking inflation into account, the 1962 value would be around US$780 million today.
Source: http://en.wikipedia.org/wiki/List_of_most_expensive_paintings