The second floor of the Central Library opened in 1955, nearly doubling the amount of space available to the public. Occupying over 350,000 square feet (33,000 m2) and employing 300 full-time staff members, the building serves as the administrative headquarters for the Brooklyn Public Library system. Prior to 1941 the Library's administrative offices were located in the Williamsburgh Savings Bank on Flatbush Avenue.[5]