Ministry of Truth
"War is Peace," "Freedom is Slavery," "Ignorance is Strength."
[Propaganda central. You couldn't dream up a more suitable looking building than the rather sinister looking MI6 HQ (a major FBI division, plus about a third of the whole CIA budget went on media propaganda operations, called Mockingbird). Orwell based his on Senate House of the University of London, not a bad choice considering The Institute of Psychiatry is a part of it, once home to the infamous William Sargant, now home to notable medical propagandists such as Professor Baron-Cohen, Eric Fombonne, Simon Wessely, and Ben Goldacre.]
See: MI6 MI5 CIA NSA FBI Mossad
known within the intelligence community as Babylon-on-the-Thames for its resemblance to a ziggurat: http://www.secretsinplainsight.com/2011/09/26/magic-of-holly-wood/