In early 1791, President Washington appointed Pierre (Peter) Charles L'Enfant to devise a plan for the new city in an area of land at the center of the federal territory that lay between the northeast shore of the Potomac River and the northwest shore of the Potomac's Eastern Branch. L'Enfant then designed in his ""Plan of the city intended for the permanent seat of the government of the United States ... "" the city's first layout, a grid centered on the United States Capitol, which would stand at the top of a hill (Jenkins Hill) on a longitude designated as 0,0°. The grid filled an area bounded by the Potomac River, the Eastern Branch (now named the Anacostia River), the base of an escarpment at the Atlantic Seaboard Fall Line along which a street (initially Boundary Street, now Florida Avenue) would later travel, and Rock Creek.(3) (4) (5) (6) Freedom Plaza in downtown D.C. contains an inlay of the central portion of L'Enfant's plan at coordinates </ref>