Charles Martel (librarian)

Charles Martel
Born5 March 1860 
Died15 May 1945  (aged 85)
OccupationLibrarian 
Employer

Charles Martel (born Karl David Hanke, March 5, 1860 – May 15, 1945) was an American librarian responsible for the creation of the Library of Congress Classification; he is often considered to be one of the most influential librarians in American library history.