The north transept became known as Statesmen's Aisle following the burial of Prime Minister William Pitt, Earl of Chatham in 1778. Here also can be found the graves of Charles James Fox, William Gladstone and Lord Palmerston and memorials to Benjamin Disraeli and Sir Robert Peel among others. The stained glass in the north rose window was designed by Sir James Thornhill in 1722, although it was altered in the late 19th century by J.L.Pearson. The three small chapels on the eastern side of this transept contain some fascinating monuments including that by Roubiliac to Lady Elizabeth Nightingale (pictured) which shows a skeletal figure of Death emerging from a cavern to aim his dart at the dying lady.