Greenwich (-ij, GRIN-) is an affluent area in south-east London, England, within the Royal Borough of Greenwich and the ceremonial county of Greater London, 5.5 miles (8.9 km) east-south-east of Charing Cross. It contains the UNESCO World Heritage Site of Maritime Greenwich.
Greenwich is notable for its astronomical and maritime history and for giving its name to the Greenwich Meridian (0° longitude) and Greenwich Mean Time. The town became the site of a royal palace, the Palace of Placentia, from the 15th century and was the birthplace of many Tudors, including Henry VIII and Elizabeth I.