During the mid-19th century, the Library evolved into a comprehensive research library to support the work of the legislature, governor’s office, and other public officials. In addition to legal and public document holdings, the Library collected materials on a wide range of research topics, including political, historical, statistical, economic and scientific works. By this time, the Library’s collection had outgrown its original space and was moved to a larger, dedicated library space when a State House addition was completed in 1856.