Why is the entirety of Columbia University labeled as 1901? Low Library was built in 1895 [1], and a number of the buildings on campus date from when the area w

Why is the entirety of Columbia University labeled as 1901? Low Library was built in 1895 [1], and a number of the buildings on campus date from when the area was a mental asylum [2]. [1] http://en.wikipedia.org/wiki/Low_Memorial_Library http://en.wikipedia.org/wiki/Low_Memorial_Library [2] http://en.wikipedia.org/wiki/Bloomingdale_Insane_Asylum http://en.wikipedia.org/wiki/Bloomingdale_Insane_Asylum