In 1988 the seventh Lubavitcher Rebbe presided at a groundbreaking ceremony for Campus Chomesh, which he established as a memorial to his Rebbetzin, Chaya Mushka Schneerson, who had died that year. The four-story, campus occupies the site of the former Lefferts General Hospital and two adjacent structures, covering nearly one city block. The campus accommodates over 2,000 students with close to 100 classrooms, as well as science labs, computer centers, libraries, a sports gymnasium, and a rooftop playground. Philanthropist Ronald Perelman provided nearly half of the $15 million funding for the campus, which opened in 1995.