From an examination of Seti's extremely well-preserved mummy, Seti I appears to have been less than forty years old when he died unexpectedly. This is in stark contrast to the situation with Horemheb, Ramesses I and Ramesses II who all lived to an advanced age. The reasons for his relatively early death are uncertain, but there is no evidence of violence on his mummy. His mummy was found decapitated, but this was likely caused after his death by tomb robbers. The Amun priest carefully reattached his head to his body with the use of linen cloths. It has been suggested that he died from a disease which had affected him for years, possibly related to his heart. The latter was found placed in the right part of the body, while the usual practice of the day was to place it in the left part during the mummification process. Opinions vary whether this was a mistake or an attempt to have Seti's heart work better in his afterlife. Seti I's mummy is about 1.7 metres (5 ft 7 in) tall.