Prime meridian

You may be looking for Greenwich Meridian.

According to a book owned by Chloe Webber, the prime meridian (0 degrees longitude) of the planet Earth ran through Greenwich in London. Other lines of longitude were measured 180 degrees east and 180 degrees west of the prime meridian. On the opposite side of the world from the prime meridian, around 180 degrees east or west, lay the International Date Line. (TV: Fear Her ^[+]Loading...["Fear Her (TV story)"])

The location of the prime meridian as seen in a book. (TV: Fear Her ^[+]Loading...["Fear Her (TV story)"])