Dolomite bowl bearing the name of the pharaoh Khaba, inscribed within a <a href="https://en.wikipedia.org/wiki/serekh" class="extiw" title="en:serekh">serekh</a>. From the 3rd dynasty, circa 2680-2613 B.C., originally from Zawiyet el-Aryan, now residing in the Museum of Fine Arts, Boston.<br>(From Pharaoh <a href="https://en.wikipedia.org/wiki/Khaba" class="extiw" title="en:Khaba">en:Khaba</a>'s article: reign: 4 year reign between 2643-2637 BC).
Keith Schengili-Roberts
CC BY-SA 2.5
Own Work (photo)