11. Comparison of Dartmouth's four planned open spaces, from left: Tuck Mall c. 1912-27, 1940s, 1960s; the Green, c.1771-; the Ravine, c.2000; the Great Lawn of Baker Library, 1928 (begun as the Quadrangle, 1895-1908). The Ravine looks as a 1994 master plan anticipated it would and represents a stage before Kiewit is demolished and the history wing of the library built (Scott Meacham).