Martin Antoine Ryerson (1856–1932) was an American lawyer, businessman, philanthropist and art collector.

A long-time trustee of the University of Chicago, he made large charitable contributions for the construction of buildings on campus.

[1][2] His father, Martin L. Ryerson, was a lumber baron in Michigan forests who invested in real estate in Downtown Chicago.

[1] He donated over $2 million to the university, including $350,000 for the construction of the Ryerson Physical Laboratory and $25,000 for the establishment of the Harper Memorial Library on campus.

When Richard T. lost his job in New York City, Ryerson encouraged him to move to Chicago.

Richard T. later founded the Crane Co.[9] Ryerson died on August 11, 1932, in Lake Geneva, Wisconsin.

[1][12] Edward W. Forbes served as the Martin A. Ryerson Professor in the Fine Arts at Harvard University from 1935 to 1944.