Userma'atre'setepenre, mercifully also known as ramses ii (1303-1213 BC) was a pharaoh
of ancient egypt
, more specifically early in the nineteenth dynasty, and considered one of the better and more significant rulers in egyptian history.
among his more notable achievements: ordering the construction of the temples at abu simbel, marrying nefertari, many outstanding military victories against the syrians and nubians and pirates, and even signing one of history's oldest recorded peace treaties (with the hittites, egypt's longtime enemies, since you asked). he is also sometimes believed to be the pharaoh mentioned in the biblical tale of exodus (evidence is sketchy, though the book of exodus does allude to the city of pi ramses, which was founded by and dedicated to ramses ii).
he died, somewhat predictably- according to manetho the historian, from simple complications relating to advanced age after 66 years of rule- and was entombed in the valley of kings, in a tomb today called KV7 by academics.
today he is best known for lending his name (or its greek form "ozymandias") to a poem by percy shelley. the theme of the poem is that the weight of history will gradually drag even men of great achievement into the dark depths of obscurity.