The double crown symbolizing the unification of Upper and Lower Egypt is the pschent.
The pschent combined the white hedjet crown of Upper Egypt with the red deshret crown of Lower Egypt. Together, the two crowns represented the pharaoh’s authority over the unified kingdom and the political union of Egypt’s two traditional lands.
The ancient Egyptian name was Pa-sekhemty, meaning “the Two Powerful Ones.” The Greek-derived word “pschent” is the form most commonly used in modern Egyptology. The crown was often shown with the uraeus cobra and vulture emblems associated with the goddesses Wadjet and Nekhbet, guardians of Lower and Upper Egypt.
Tradition credited the First-Dynasty ruler Menes with unifying Egypt, although the historical process was more complex and the identity of Menes remains debated. The earliest known depiction of a ruler wearing the double crown is associated with the First-Dynasty king Djet. No complete ancient pschent has survived; knowledge of it comes from statues, reliefs, labels, and inscriptions.