Quadrants of Washington, D.C.
Washington, D.C., is administratively divided into four geographical quadrants of unequal size, each delineated by their ordinal directions from the medallion located in the Crypt under the Rotunda of the Capitol. Street and number addressing, centered on the Capitol, radiates out into each of the quadrants, producing a number of intersections of identically named cross-streets in each quadrant.
Source: Wikipedia — Quadrants of Washington, D.C. (CC BY-SA 4.0)