He is the last king in the
First Dynasty
. His tomb at
Abydos
included several jar sealing and labels upon which his
Horus
name was written . His tomb at
Saqqara
, unearthed in 1954 , was found to be a vast building measuring 65 x 37 meters . From the scenes in the tomb we could get much information about the names of his high officials and the positions which they occupied . This brings in light the administrative system of the country . For some officials were supervisors on projects of irrigation , taxes collection and the registration of events .
The end of the First Dynasty is rather problematic , since it is clear that the unusually long duration of Den Reign had led to a struggle for succession to the throne after his death . Both
Semerkhet
and his successor Qa-aa were buried at Abydos . By Qa-aa Reign , the First Dynasty witnessed its end . At the turn of this Dynasty , the centre of power seems to have been moved to Memphis . This is according to the fact that at least the first three kings of the
Second Dynasty
were
buried in the Saqqara Necropolis , which indicates that the centre of power had been moved to Memphis . Another indication of this power shift was the name of the first ruler of this dynasty .