From the library's "About" page:
Constantine Township Library is located in St. Joseph County in southwestern lower Michigan on the beautiful St. Joseph River.
In 1915 a group of community minded citizens of Constantine organized a library which was opened to the public on June 24, 1916 with Miss Helen Helme as the first librarian. They started by donating books from their homes and the village council voted $100 towards renting a room in the business district. [1]