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Mursili III, also known as Urhi-Teshub, was a king of the Hittites who assumed the throne of the Hittite empire (New Kingdom) at Tarhuntassa upon his father's death. He was a cousin of Tudhaliya IV and Queen Maathorneferure. He ruled ca. 1282–1275 BC (middle chronology) or 1272–1265 BC (short chronology).