Known more recently as "91 Prospect," the fomer Court Club has moved across Prospect street to make room for the new engineering campus.

In recent years, 91 Prospect has been home to Princeton’s Office of the Dean for Research. In 2021, the Princeton Planning Board approved a plan to rotate the building 180 degrees and relocate it on the opposite side of the street as Princeton University prepares to build a new campus for Environmental Studies and the School of Engineering and Applied Science.