In fact it is two cities The City of London and Westminster with the West End the centre. It is a city of huge contrasts. More than 30% of London is made up of parks and green space yet it also provides some of the best shopping opportunities in the world, from major department stores to designer boutiques and street markets. The nightlife is legion with huge numbers of restaurants, pubs, cinemas, theatres, nightclubs live music and comedy venues. There are currently four World Heritage Sites - Palace of Westminster, Tower of London, Maritime Greenwich and Kew Gardens and 17 national museums. It is the home of the royal family and the Changing the Guard Ceremony is conducted outside Buckingham Palace most days. Sir Christopher Wren redesigned much of London’s buildings after the Great Fire, including St. Pauls Cathedral and The Royal Observatory Greenwich which was founded in 1675 by Charles II to find out the 'so-much desired longitude of places for perfecting the art of navigation'