Title: The International Meridian Conference at Washington. A view of the writers buildings in Calcutta.
Description: On 1 October 1884 the United States hosted the International Meridian Conference in Washington. Representatives of 25 countries attended, and one of the aims was to fix a common prime meridian for time and longitude throughout the world. The delegates voted to accept the Greenwich Meridian as the world's prime meridian.
Credit line: National Maritime Museum, London