NEW YORK, N.Y.- The first comprehensive exhibition to trace one of the most defining achievements in New York City’s history—the breathtaking vision, planning, and implementation of Manhattan’s iconic grid system—is now on view at the Museum of the City of New York. The Greatest Grid: The Master Plan of Manhattan, 1811—2011, on view through April 15, 2012, documents the development of the “Commissioners’ Plan,” which in 1811 specified numbered streets and avenues outlining equal rectangular blocks ranging from (today’s) Houston Street to 155th Street and from First Avenue to Twelfth Avenue. The exhibition, which is organized on the occasion of the bicentennial of the plan, elucidates, through remarkable maps, photographs, and other historic documents, this monumental infrastructure project—the city’s first such civic endeavor—which transformed New York throughout the 19