The first library at North Carolina State University was a room in Holladay Hall during the early years of the institution. The library was chronically under-funded, and faculty and students consistently complained about a lack of materials. The room in Holladay continued to serve as the library until the construction of a new purpose-built library building, what is now Brooks Hall. In 1954, the current building, the D.H. Hill Library Building, was opened. This building now comprises the east wing of the current structure. By the mid-1960s, the Hill building was no longer large enough, and the library space was expanded by building an 11-story book tower and connecting the original space with the former student union (now the Erdahl-Cloyd or west wing of the library). Further expansion and renovation occurred in the 1980s, culminating in 1990 with the opening of the second, or "south" bookstack tower.