The Arthur W. Diamond Law Library is the law library of Columbia Law School. Located in Jerome L. Greene Hall on the university's Morningside Heights campus, it holds over 1.3 million volumes, and as of 2021[update], it is the second largest academic law library in the United States.[1] It was named for alumnus Arthur W. Diamond following a $7 million donation from the Miriam and Arthur W. Diamond Charitable Trust to Columbia Law School.[1]