Today, Greenwich is generally associated with the prime meridian, but this was not always the case. In fact, before Greenwich, the Ferro meridian was known as the original prime meridian since the times of ancient Greece. The idea of using the westernmost point in the world for the zero meridian is an old concept, with evidence dating back to the days of Ptolemy. This westernmost point was located at the semi-mythical Islands of the Blessed, which was believed to be to be the Canary Islands. This meridian was later made official…
