Belle da Costa Greene, American librarian and bibliographer (died 1950)

Belle da Costa Greene was an American librarian who managed and developed the personal library of J. P. Morgan. After Morgan died in 1913, Greene continued as librarian for his son, Jack Morgan, and in 1924 was named the first director of the Pierpont Morgan Library. Despite being born to black parents, Greene spent her professional career passing for white.

December 13 is the 347th day of the year in the Gregorian calendar; 18 days remain until the end of the year.