Belle da Costa Greene (December 13, 1883 – May 10, 1950) was the librarian to J.
P.
Morgan.
After Morgan's death in 1913, Greene continued as librarian under his son, Jack Morgan.
In 1924 the private collection was incorporated by the State of New York as a library for public uses, and the Board of Trustees appointed Greene first director of the Pierpont Morgan Library.