The yellow or red disk-like sun emblem in Egyptian art represents the Eye of Ra. Because of the great importance of the sun in Egyptian religion, this emblem is one of the most common religious symbols in all of Egyptian art. Although Egyptologists usually call this emblem the "sun disk", its convex shape in Egyptian relief sculpture suggests that the Egyptians may have envisioned it as a sphere. The emblem often appears atop the heads of solar-associated deities, including Ra himself, to indicate their links with the sun. The disk could even be regarded as Ra's physical form. At other times, the sun god, in various forms, is depicted inside the disk shape, as if enclosed within it. The Egyptians often described the sun's movement across the sky as the movement of a barque carrying Ra and his entourage of other gods, and the sun disk can either be equated with this solar barque or depicted containing the barque inside it. The disk is often called Ra's "daughter" in Egyptian texts.