This relief sculpture, officially known as a the Wilbour Plaque, is an artist’s reference — a sketch in stone that was hung in the workshop by the hole at the top of the stone, studied and copied by students. The figure on the left is thought to be Akhenaten, oposite him queen Nefertiti, they both wear uraeus headdresses bearing the sacred serpent — emblems of supreme power.
In 1880, Charles Edwin Wilbour traveled to Egypt. An american lawyer, journalist and Egyptologist, Wilbour had spent much of his life consulting with the British Museum and working with historians — and at age 47 he became an archeologist. During his travels through Egypt by houseboat Wilbour worked at archeological sites through the country, and compiled a collection of papyri and artifacts that would later be donated to the Brooklyn Museum.
Reed Enger, "Akhenaten and Nefertiti," in Obelisk Art History, Published September 27, 2015; last modified May 19, 2021, http://arthistoryproject.com/timeline/the-ancient-world/egypt/akhenaten-and-nefertiti/.