Over the long history of the university, the function of the College Green has evolved. The campus has expanded, primarily to the north and east, relocating much of the residential, academic and student service functions of the campus further away from the College Green. The College Green has undergone numerous changes including the addition and removal of buildings, designation of new purposes for existing buildings, the reorganization of walkways as traffic patterns changed and the evolution and rejuvenation of the landscape. As the campus expanded, new greens and corridors have developed on campus, though none is more treasured or significant as the College Green.