Examine how the prime meridian came to be, where it is located, and see actual pictures of the prime meridian.

Examine how the prime meridian came to be, where it is located, and see actual pictures of the prime meridian.

Examine how the prime meridian came to be, where it is located, and see actual pictures of the prime meridian.

A plan of the city of Washington from 1790. The lat/long figures on the map shows a longitude of 0 degrees 0 based on the Washington Prime Meridian passing through the Capitol. "This city was laid out by Peter Charles L'Enfant, who...

Map of pre-colonial Africa, showing the predominately native countries and territories of the African continent in 1879. The counties include the Barbary States of Morocco, Algeria, Tunis, Tripoli and Fezzan, the Egyptian territories of...

A map from 1872 of Maine showing the State capital of Augusta, counties and county seats, major cities, towns and ports, railroads, mountains, lakes, rivers, and coastal features. An inset map details the vicinity of Portland. Clock...