Answered By: Cliff Wunderlich Last Updated: Aug 19, 2015 Views: 142
It was designed by Pierre de Chaignon la Rose, who designed the shields of the graduate schools for the 1936 Harvard Tercentenary.
It’s covered in this article: Hammond, Mason. “A Harvard Armory: Part I,” Harvard Library Bulletin, volume XXIX, Number 3 (July 1981), p. 261-297.
Read the first couple of pages to get the background; the Divinity shield is described on p. 278/seq. 14243.