Courtesy of BPL collections. Established in 1848, the Boston Public Library was the first large, free municipal library in the United States.The Boston Public Librarys first building of its own was a converted former schoolhouse located on Mason Street that opened to the public in 1854. As soon as the library occupied the building, it was apparent that the amount of visitors and collections could not effectively be held in the cramped quarters. Planning began almost immediately for its first purpose-built library. Less than a year later, in December 1854, library commissioners were authorized to purchase a lot and fund the construction of the new library. A desirable building lot on Boylston Street, opposite the Boston Common, was purchased and a public invitation for proposals from architects was held. The requirements for the building included: a library hall with alcoves capable of containing on fixed shelves at least 200,000 volumes, a general reading room with ample accommodations at tables for at least 150 readers, a ladies reading room, an adjacent library room for the arrangement of 20,000 books most constantly demanded for circulation, and quarters for the Trustees and Librarian. The facade was to be of brick, with stone dressing. The selected design by architect, Charles Kirk Kirby, was for this handsome Italianate style building which took nearly three years to build, opening in September 1858. Twenty years later, as the library outgrew that space, the Trustees asked the state legislature for a plot in the newly filled Back Bay, and planning began on the McKim Building, built in 1895 down Boylston Street. This building, the first purpose-built Boston Public Library building, was demolished in 1898, and replaced by the ten-story Colonial Theater Building. It stood just 40 years.