The Parker Hill Branch Library is a publicly funded and managed library that serves more than 650,000 residents in the city of Boston, the state capital of Massachusetts. It is an affiliate branch of the Boston Public Library (BPL). BPL was established in 1948 and first opened to the public in 1854 at Mason Street, where which started with only a 16,000-volume collection. Today, it has expanded to fully cater to its patrons, and Parker Hill Branch Library is only one of the 26 branches. The branch contributes to the overall collection and services of the library system, which includes more than 8.2 million books and serial volumes, more than 50,000 E-Books, more than 38,000 audio files, and more than 68,000 video files. The library system circulates more than 3.7 million items, has more than 200,000 registered borrowers, and receives more than 3.7 million visitors annually across its 26 locations.