Robert Pershing Wadlow, also known as the Alton Giant and the Giant of Illinois, was an American man. He is the tallest person in recorded history for whom there is irrefutable evidence. Wadlow was born and raised in Alton, Illinois, a small city near St. Louis, Missouri. Wadlow's height was 8 ft 11.1 in (2.72 m) while his weight reached 439 lb (199 kg) at his death at age 22. His great size and his continued growth in adulthood were due to hypertrophy of his pituitary gland, which results in an abnormally high level of human growth hormone (HGH). On July 4, 1940, during a professional appearance at the Manistee National Forest Festival, a faulty brace irritated his ankle, leading to infection. He was treated with a blood transfusion and surgery, but his condition worsened and he died in his sleep on July 15, 1940. His coffin measured 10 ft 9 in (3.28 m) long by 2 ft 8 in (0.81 m) wide by 2 ft 6 in (0.76 m) deep, weighed over 1,000 lb (450 kg), and was carried by twelve pallbearers and eight assistants. He was buried at Oakwood Cemetery in Alton, Illinois. A life-size statue of Wadlow was erected opposite the Alton Museum of History and Art in 1986.