In 1870, Notman's original three-bay nave was extended by another bay to accommodate the influx of students during the McCosh era. The chapel became the "Old Chapel" after Marquand Chapel, designed by Richard Morris Hunt, was completed in 1882. It continued to serve as a lecture hall and meeting room until 1897, when it was demolished in the 1890s (along with East College) to make way for the new Pyne Library.