Queen Victoria and Albert were married on 10 February 1840, in the Chapel Royal of St James's Palace, London.
Source: Wikipedia
During World War II Niels Bohr was given an apartment at St James's Palace and an office with the British Tube Alloys nuclear weapons development team.
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The sudden and unexpected death of an extraordinarily popular royal figure Diana, Princess of Wales brought statements from senior figures worldwide and many tributes by members of the public. People left public offerings of flowers, candles, cards, and personal messages outside Kensington Palace for many months. Her coffin, draped with the royal flag, was brought to London from Paris by Prince Charles and Diana's two sisters on 31 August 1997. The coffin was taken to a private mortuary and then placed in the Chapel Royal, St James's Palace.
Source: Wikipedia