The Georgia Institute of Technology Historic District is situated on and around the crest of "The Hill," the highest elevation of the school's original nine-acre campus. Comprising 12 buildings, the Old Campus is a landscaped cluster of mixed-period classroom, dormitory and administrative brick buildings. Buildings of the Old Campus include the Carnegie Building, which was the campus library until 1953; the Georgia Tech President's Office is now located there. Lyman Hall Laboratory, named after
Lyman Hall, one of Georgia Tech's earlier presidents, was the school's first Chemistry Building. The YMCA Building, funded by
John D. Rockefeller in 1910, now houses the Georgia Tech Alumni Association Offices. The random placement of these buildings around the centrally positioned Administration Building ("
Tech Tower") has created unique urban spaces. Hundred-year-old trees shade the red brick buildings and enhance the sense of special enclosure. A brick roadway, Uncle Heinie Way, wraps around the Administration Building and provides both service and vehicular access to the buildings in this portion of the Campus. A new plaza, Harrison Square, which both a hard surface of brick and concrete as well as an open green space, was created in 1968 after the demolition of the Old Shop, the successor of the original (a near-twin to the adjacent Administration building which burned down shortly after its completion). ==Style, form, planning==