Belle da Costa Greene, American librarian (d. 1950)

Belle da Costa Greene (November 26, 1879 – May 10, 1950) was an American librarian best known for managing and developing the personal library of J. P. Morgan. After Morgan's death 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.