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 from 1756 to 1761 (with a brief interlude in 1757), during the Seven Years' War (known as the French and Indian War in the United States). He again led the ministry, holding the official title of Lord Privy Seal, between 1766 and 1768. Much of his power came from his brilliant oratory. He was out of power for most of his career and became well known for his attacks on the government, such as those on Walpole's corruption in the 1730s, Hanoverian subsidies in the 1740s, peace with France in the 1760s, and the uncompromising policy towards the American colonies