Chatham University M. Laughlin Jr. and James Rea. It was renamed Pennsylvania College for Women in 1890, and as Chatham College in 1955. The name served to honor William Pitt, 1st Earl of Chatham and namesake of the City of Pittsburgh. The school gained university status from the Pennsylvania Department of Education on April 23, 2007, and publicly announced its new status on 2007-05-01, changing its name to Chatham University. With elements designed for the original Andrew Mellon estate by the Olmsted Brothers, the Shadyside Campus was designated an arboretum in 1998 by the American Association of Botanical Gardens and Arboreta. It
William Pitt, 1st Earl of Chatham entire tenure of office. Chatham rarely saw any of his colleagues though they repeatedly and urgently pressed for interviews with him, and even an offer from the King to visit him in person was respectfully declined. While his gout seemed to improve, he was newly afflicted with mental alienation bordering on insanity. Chatham's lack of leadership resulted in an incohesive set of policies. Chatham dismissed his allies Amherst and Shelburne from their posts, and then in October 1768 he tendered his own resignation on the grounds of poor health, leaving the leadership to Grafton, his First Lord of the Treasury.