One measure of Egypt's prosperity is the amount of temple building the kings could afford to carry out, and on that basis the reign of Ramses II is the most notable in Egyptian history, even making allowance for its great length. It was that, combined with his prowess in war as depicted in the temples, that led the Egyptologists of the 19th century to dub him "the Great," and that, in effect, is how his subjects and posterity viewed him; to them he was the king par excellence. Nine kings of the 20th dynasty called themselves by his name; even in the period of decline that followed, it was an honour to be able to claim descent from him, and his subjects called him by the affectionate abbreviation Sese.

In Egypt he completed the great hypostyle hall at Karnak (Thebes) and continued work on the temple built by Seti I at Abydos, both of which were left incomplete at the latter's death. Ramses also completed his father's funerary temple on the west bank of the Nile at Luxor (Thebes) and built one for himself, which is now known as the Ramesseum. At Abydos he built a temple of his own not far from that of his father; there were also the four major temples in his residence city, not to mention lesser shrines.

In Nubia (Nilotic Sudan) he constructed no fewer than six temples, of which the two carved out of a cliffside at Abu Simbel, with their four colossal statues of the king, are the most magnificent and the best known. The larger of the two was begun under Seti I but was largely executed by Ramses, while the other was entirely due to Ramses. In the Wadi Tumilat, one of the eastern entries into Egypt, he built the town of Per-Atum (biblical Pithom), which the Bible calls a store city (Exodus 1:11) but which probably was a fortified frontier town and customs station. In fact, there can have been few sites of any importance that originally did not exhibit at least the name of Ramses, for, apart from his own work, he did not hesitate to inscribe it on the monuments of his predecessors. In addition to the construction of Pi-Ramesse and Pithom, his most notable secular work, so far as is known, included the sinking of a well in the eastern desert on the route to the Nubian gold mines.

Of Ramses' personal life virtually nothing is known. His first and perhaps favourite queen was Nefertari; the fact that, at Abu Simbel, the smaller temple was dedicated to her and to the goddess of love points to real affection between them. She seems to have died comparatively early in the reign, and her fine tomb in the Valley of the Tombs of the Queens at Thebes is well known. Other queens whose names are preserved were Isinofre, who bore the king four sons, among whom was Ramses' eventual successor, Merneptah; Merytamun; and Matnefrure, the Hittite princess. In addition to the official queen or queens, the king, as was customary, possessed a large harem, and he took pride in his great family of well over 100 children. The best portrait of Ramses II is a fine statue of him as a young man, now in the Turin museum; his mummy, preserved in a mausoleum at Cairo, is that of a very old man with a long narrow face, prominent nose, and massive jaw.

The reign of Ramses II marks the last peak of Egypt's imperial power. After his death Egypt was forced on the defensive but managed to maintain its suzerainty over Palestine and the adjacent territories until the later part of the 20th dynasty, when, under the weak kings who followed Ramses III, internal decay ended its power beyond its borders. Ramses II must have been a good soldier, despite the fiasco of Kadesh, or else he would not have been able to penetrate so far into the Hittite Empire as he did in the following years; he appears to have been a competent administrator, since the country was prosperous, and he was certainly a popular king. Some of his fame, however, must surely be put down to his flair for publicity: his name and the record of his feats on the field of battle were found everywhere in Egypt and Nubia. It is easy to see why, in the eyes both of his subjects and of later generations, he was looked on as a model of what a king should be.