(Click on images to enlarge.)
Other illustrious alumni besides Theodor Geisel (aka Dr. Seuss who has an entire museum devoted to him across the street) are: Taj Mahal, William Manchester, and Timothy Leary. As far as I can tell, the Leary Museum keeps a very low profile.
The present atrium was created by removing the high school’s auditorium seating and floor, and exposing the lunchroom in the former basement. The grand staircase was added as part of the conversion to luxury apartments that began in 1986.