Hatton Garden is a street and area near Holborn in London, England. Its name is derived from the garden of the Bishop of Ely, which was given to Sir Christopher Hatton by Elizabeth I in 1581, during a vacancy of the see.
The area around Hatton Garden has been the centre of London's jewellery trade since medieval times. The old City of London had certain streets, or quarters, dedicated to types of business, and the area around Hatton Garden became a centre for jewellers and jewellery. http://en.wikipedia.org/wiki/Hatton_Garden