Windsor Castle is the oldest and largest inhabited castle in the world. It has been the family home of British kings and queens for almost 1,000 years. It is an official residence of Her Majesty The Queen, whose standard flies from the Round Tower when she is in residence.

Eton was founded by King Henry VI in 1440 and lies just across the river Thames from the pretty Berkshire town of Windsor; most famous for its royal castle.

http://www.etoncollege.com/Default.aspx

Be amazed by the glittering interiors of the grandest address in the capital, once known as 'Number 1 London'. This beautiful Georgian building was the London home of the first Duke of Wellington and has changed very little since his great victory at Waterloo in 1815.

The royal family may have left Hampton Court in 1737 but the palace and its apartments soon found another purpose. From the 1760s onwards, the palace was divided up for ‘grace-and-favour’ residents who were granted rent-free accommodation because they had given great service to the Crown or country. They lived, often with their own small households of servants above, underneath and around the state apartments.

Spencer House is London’s most magnificent eighteenth-century aristocratic palace
Built between 1756-1766 for John, first Earl Spencer, an ancestor of Diana, Princess of Wales (1961-1997) it is London’s finest surviving eighteenth-century town house.