Boston Public Library. The Boston Public Library is a municipal public library system in Boston, Massachusetts, United States, founded in 1848.
   The Boston Public Library is also the Library for the Commonwealth of the Commonwealth of Massachusetts; all adult residents of the commonwealth are entitled to borrowing and research privileges, and the library receives state funding. The Boston Public Library contains approximately 24 million items, making it the third-largest public library in the United States behind the federal Library of Congress and the New York Public Library, which is also privately endowed.
   In fiscal year 2014, the library held more than 10,000 programs, all free to the public, and lent 3.7 million materials. This building was designated as a Boston Landmark by the Boston Landmarks Commission in 2000.
   According to its website, the Boston Public Library has a collection of more than 23.7 million items, which makes it one of the largest municipal public library systems in the United States. The vast majority of the collection, over 22.7 million volumes, is held in the Central Branch research stacks.
   Between July 2012 and June 2013, the annual circulation of the BPL was 3.69 million. Because of the strength and importance of its research collection, the Boston Public Library is a member of the Association of Research Libraries, a not-for-profit organization comprising the research libr
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