In 2013, archaeologists discovered a set of papyri written by individuals involved in the construction of the Great Pyramid. Among the papyri was the Diary of Merer, written by a middle-ranking official tasked with transporting blocks from the quarry to the construction site. The diary, which has been called "the greatest discovery in Egypt in the 21st century", describes a system of canals and waterways being used to transport the blocks.[39]