Charles Diehl retired in 1948, and the Board of Trustees unanimously chose physics professor Dr. Peyton N. Rhodes as his successor. During Rhodes' sixteen-year presidency the college admitted its first Black students; added ten new buildings, including Burrow Library, Mallory Gymnasium, and the emblematic Halliburton Tower; increased enrollment from 600 to 900; founded a campus chapter of the Phi Beta Kappa Society; and grew the endowment to over $14 million. In 1984, the Board of Trustees decided the name "Southwestern" needed to be retired, and the college's name was changed to Rhodes College to honor the man who had served the institution for more than fifty years.