Campus Martius Park is a re-established park in downtown Detroit, Michigan. After the fire of 1805, Campus Martius (from the Latin for Field of Mars, where Roman heroes walked) was the focal point of Judge Augustus Woodward's plans to rebuild the city. It is where the "point of origin" of Detroit's coordinate system is located. Seven miles (11 km) north of this point is Seven Mile Road; eight miles (13 km) north is Eight Mile Road, and so on. The point of origin is marked by a medallion just in front of the park's concession building. - Source: Wikipedia
