What is the world's largest pie?

Florence Nightingale is credited with developing an early form of the pie chart which she called the "coxcomb" which she first published in 1858. This form of pie chart is now known as the polar area diagram (Polar-Area Diagram), or occasionally the Nightingale rose diagram. The polar area diagram is similar to a usual pie chart, except that the sectors are each of an equal angle and differ rather in how far each sectors extends from the centre of the circle. It has been suggested that most of Nightingale's early reputation was built on her ability to give clear and concise presentations of data.