Djer's daughter was Queen Meryt-Neith , whose tomb has been excavated in the royal necropolis at
Abydos
. Djer Reign is characterized by further developments in foreign policy , that include expeditions to Nubia , Libya and Sinai . He also set the economic and religious organization of the country and built a palace at
Memphis
and a tomb for himself at Abydos , where he may even have been the historical prototype of Osiris . Two great tombs belonging to Djer were found at Abydos and
Saqqara
. For some reasons , the Ancient Egyptians in a later period thought that Djer's tomb at Abydos was the tomb of Osiris . They performed pilgrimage to it and presented offerings until it was assured that it is the tomb of Djer by archaeological discoveries . He was buried along with the rest of his court , although this does not necessarily mean that his courtiers were obliged to die violently to accompany their sovereign into the grave . However , this was the first case of the pharaoh's recognition of the funerary needs of his subordinates .
Djer Reign was a time of great prosperity , due to the funerary furniture in the private tombs of his contemporaries . Djer continued Hor-aha's wars against the
Nubians and established his rule as far up river as the second cataract . This important event is engraved on a sandstone slab which was found on Gebel Sheikh Suliman , about 11 km south of Wadi Halfa . This slab has been cut and transferred to Khartoum where it is now in the garden of the new museum . It shows that the kings of the
1st Dynasty
were interested in safegardining the southern borders of
Egypt
and in invading the areas to the south of the first cataract for the trade movement with Sudan . Recent excavations at Saqqara have brought to light a large tomb belonging to Her-Neith who might have been his wife .