St. James' Palace and Clarence House
Just a short walk across Green Park is one of the oldest royal residences: St. James' Palace. It was the primary royal residence until Queen Victoria decided to move to Buckingham Palace, and now houses offices. Princess Beatrice and Prince George were christened in the palace's chapel, and Kate Middleton was confirmed there before she got married. Part of the layout contains Clarence House, which is Prince Charles' London residence. When William and Harry returned from boarding school it was their base, and where they stayed with their father the night before the royal wedding.