Menpehtyre Ramesses I (traditional English: Ramesses or Ramses) 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 BC is frequently cited as well as 1295–1294 BC. While Ramesses I was the founder of the 19th dynasty, in reality his brief reign marked the transition between the reign of Horemheb who had stabilized Egypt in the late 18th dynasty and the rule of the powerful pharaohs of this dynasty, in particular his son Seti I and grandson Ramesses II, who would bring Egypt up to new heights of imperial power.