Located in the northwest corner of the courtyard at CIA headquarters in Langley, VA is a sculpture called "Kryptos" by artist James Sanborn. Dedicated on November 3, 1990, the theme of this sculpture is "intelligence gathering." Kryptos has four coded passages, but only three have been broken in the past 15 years. Apparently, many Kryptos aficionado groups have sprouted on the Internet, and the sculpture has seen decent airtime in Blogdom. Word is that Davinci Code author Dan Brown may use this sculpture as the central theme of an upcoming book.