The Harris I Papyrus, also known as the Great Harris Papyrus, is an ancient Egyptian text dating to the reign of Ramesses III. Its technical designation is "Papyrus British Museum EA 9999". At 41 metres long, it is the longest known papyrus from Egypt and contains approximately 1,500 lines of text." It dates to the 20th Dynasty. Almost all the papyri in Harris's collection come from the same find, dating to the 20th Dynasty. The Arab seekers who presented them to Harris in 1855 showed him a sackful of papyri which they claimed had been found by them at the foot of the southern escarpment of the small valley that leads from Medinet Habu to Deir el-Medina in the same cache, a sort of cave twenty feet below a layer of clay mixed with pottery shards, where the bundle of twenty papyri had been found. The papyrus labelled Harris 1 was the longest of them and relatively well preserved. It is probable that this mass of papyri came from the archives of the temple of Medinet Habu, the administrative center of Ramesses III.