Earl of Londonderry extinct on the death of his great-grandson, the fourth Earl, in 1714. The second creation came in 1726 in favour of the soldier and politician Thomas Pitt, 1st Baron Londonderry. He had already been created Baron Londonderry in 1719 and was made Viscount Gallen-Ridgeway at the same time as he was granted the earldom, also in the Peerage of Ireland. He was the husband of Lady Frances Ridgeway, daughter and heiress of the fourth Earl of the first creation. A member of the prominent Pitt family, he was the uncle of William Pitt, 1st Earl of Chatham. His younger son,
Chatham Center Chatham Center Chatham Center is a 5.5 acre commercial and residential building complex located within Downtown Pittsburgh. It is bounded by the Interstate 579 (Crosstown Boulevard) on the west, Centre Avenue on the north, Washington Place on the east, and Fifth Avenue to the south. Comprising a 2,200 car parking garage, Marriott Hotel, World Trade Center, luxury condominium building, and office and retail space, Chatham Center is a major destination center with PPG Paints Arena and Duquesne University nearby. Chatham Center was named after the Earl of Chatham, William Pitt, for whom Pittsburgh is named. Groundbreaking for the project occurred