Charles Stanhope, 3rd Earl Stanhope, aka Charles Mahon, 3rd Earl Stanhope, FRS, was a British statesman, inventor, and scientist. He was the father of Lady Hester Stanhope and brother-in-law of William Pitt the Younger. He is sometimes confused with an exact contemporary of his, Charles Stanhope, 3rd Earl of Harrington.

Lady Hester Lucy Stanhope was a British adventurer, writer, antiquarian, and one of the most famous travellers of her age. Her excavation of Ascalon in 1815 is considered the first to use modern archaeological principles, and her use of a medieval Italian document is described as "one of the earliest uses of textual sources by field archaeologists". Her letters and memoirs made her famous as an explorer.