Menpehtyre Ramesses I (also written Ramses or Rameses) was the founding Pharaoh of Ancient Egypt's 19th Dynasty. The dates for his short reign are not completely known but the time-line of late 1292-1290 B.C.E. is frequently cited as well as 1295-1294 B.C.E. While Ramesses I is widely regarded as the founder of the 19th Dynasty, in reality his brief reign marked the transition between the deign of Horemheb who had stabilised Egypt and the rule of the powerful Pharaohs of this dynasty, in particular Seti I and Ramesses II, who would bring Egypt up to new heights of imperial power.