The Sean Collier Memorial is a large abstract environmental sculpture located on the campus of the Massachusetts Institute of Technology in Cambridge, Massachusetts. It was designed by MIT faculty and students in memory of Sean Collier, a member of MIT Campus Police, who had been killed at the site by the Boston Marathon bombers on April 18, 2013. The project was proposed, designed, funded, fabricated, and installed in less than two years, and formally dedicated on April 29, 2015.