Sed festival
Seal impressions provide evidence of a new royal residence called "Horus the shining star" that was constructed by Hotepsekhemwy. He also built a temple near Buto for the little-known deity "Netjer-Achty" and founded the "Chapel of the White Crown". The white crown is a symbol of Upper Egypt. This is thought to be another clue to the origin of Hotepsekhemwy's dynasty, indicating a likely source of political power. Egyptologists such as Nabil Swelim point out that there is no inscription from Hotepsekhemwy's reign mentioning a Sed festival, indicating the ruler cannot have ruled longer than 30 years (the Sed festival was celebrated as the anniversary marking a reign of 30 years).