Bailey Island Library Hall is the most noteworthy and visible 20th century architectural landmark on this island community in the Town of Harpswell. Located on the main road through the village, the building was commissioned in 1909 and erected three years later by the Bailey Island Library Association, a mixture of year round and summer residents, to serve as a social hall and lending library. The wood frame structure was designed by the New York architectural firm of Mann & MacNeille, both summer residents on the island, and in design it strongly references George Washington?s Mount Vernon residence, complete with cupola, colonnade and Palladian windows. Although the lending library no longer functions the building continues to be used on a regular basis as a community hall by the island?s population. The Bailey Island Library Hall was listed in the National Register of Historic Places as a site important both to the social and educational history of the island, and as a significant example of the work of a master architectural firm, Mann & MacNeille.