Historical maps and plans, the earliest dating to Bangor's incorporation as a town in 1834. Additional maps are available to view in the Local History Room.

An unofficial weekly newspaper published in the interest of personnel at Dow Air Force Base, Maine. Additional years are available to view in the Local History Room.

In June 1958, Bangor voters approved the creation of the Bangor Urban Renewal Authority by referendum. These materials document Urban Renewal projects that reshaped Bangor in the 1950s and 1960s.

Glass lantern slides, some hand-colored, showing the Bangor Fire of 1911 and its aftermath. Some of these photographs were published in the photobook "Views of Bangor's Big Fire."

Posters used to recruit service members, encourage thrift at home, and help fund the war. Bangor Public Library acquired its collection of war posters through the efforts of L. Felix Ranlett, a World War I veteran and librarian from 1937 to 1962.

Photograph-rich publications documenting the deployment of a particular ship during World War II, including the ship's history, travels, battles, and personnel.

Photograph-rich publications documenting the history of individual military units during World War II, including the unit's organization, personnel, military campaigns, and casualties. This collection was compiled by World War II-era librarian L. Felix Ranlett, a veteran of World War I.