Horemheb, the last Pharaoh of the 18th dynasty, didn't have an inheritor, so he appointed another general as his successor, who came to the throne under the name Ramesses I., who became the founder of the 19th dynasty. He managed to consolidate the position of the new dynasty, but bigger boom came to Egypt under the reign of his son Seti I. and his grandson Ramesses II.
The long reign of Ramesses II. (66 years) ended with his death in 1,212 BC and it marked the end of a period of prosperity and boom in Egypt. Merenptah, the thirteenth son of Ramesses II, came to the throne, who was about 60 at that time. Mereptah succeded in preserving the prestige of Egypt, but the position of superpowers was shaken by the great moving of Indo-European nations at the end of 2nd millennium BC.
|Ramesses I||2 years||strengthening the position of new dynasty|
|Seti I||14 years|| beginning of building the so-called Great Hypostyle Hall in Karnak
and the temple in Abydos
|Ramesses II||66 years||building the temple in Abu Simbel; battle of Kadesh|
|Seti II||5 years|