Serekh

Serekh in hieroglyphs
(Unicode: 𓊁 ) srḫ/ serekh façade (of the palace)

In Egyptian hieroglyphs, a serekh is a rectangular enclosure representing the niched or gated façade of a palace surmounted by (usually) the Horus falcon, indicating that the text enclosed is a royal name. The serekh was the earliest convention used to set apart the royal name in ancient Egyptian iconography, predating the later and better known cartouche by four dynasties and five to seven hundred years.