The Old Royal Observatory, Greenwich, London

D5611-1

The Old Royal Observatory, Greenwich, London Long Caption: The bright red Time Ball on top of Flamsteed House is one of the world's earliest public time signals, distributing time to ships on the Thames and many Londoners. It was first used in 1833 and still operates today. Credit line: © National Maritime Museum, Greenwich, London. Object: not catalogued Date: 1998 Medium: photograph Click here to buy a bespoke print of this image.