The Queen's House was built around 1530, in a very different "Tudor" style, trimmed with wood; it's one of the few such buildings to survive the Great Fire of London of 1666 (thanks to its protected spot inside stone walls.)
Henry VIII probably built the Queen's House for Ann Boleyn, who was soon afterwards beheaded -- thanks to Henry-- at the Tower Green. Her daughter, the famous Queen Elizabeth I, probably dined at Queen's House in later years, though she lived in another Tower.
(And by the way, Queens and Kings haven't lived here for quite a while, preferring the comfort of Buckingham Palace instead: life in the Tower of London must have been cold and grim-- much better suited to its many prisoners.)
Early on, a floor for a Council Chamber was added to the Queen's House and it was here, in 1608, that Guy Fawkes was made to confess his plot to blow up the Houses of Parliament with gunpowder. (If you're in England on November 5th, you'll see Guy Fawkes Day celebrated with bonfires and fireworks.)
The Tower of London is full of history: the more you read, the more the place will come to life. See links for More on the Tower of London, above.
