Sirius its constellation, Canis Major (Greater Dog). The heliacal rising of Sirius marked the flooding of the Nile in Ancient Egypt and the "dog days" of summer for the ancient Greeks, while to the Polynesians in the Southern Hemisphere the star marked winter and was an important reference for their navigation around the Pacific Ocean. The brightest star in the night sky, Sirius is recorded in the earliest astronomical records. Its displacement from the ecliptic causes this heliacal rising to be remarkably regular compared to other stars, with a period of almost exactly 365.25 days holding it constant relative to the
Ancient of Days to portray him as he was incarnate. This iconography emerged in the 6th century, mostly in the Eastern Empire with elderly images, although usually not properly or specifically identified as "the Ancient of Days." The first images of the Ancient of Days, so named with an inscription, were developed by iconographers in different manuscripts, the earliest of which are dated to the 11th century. The images in these manuscripts included the inscription "Jesus Christ, Ancient of Days," confirming that this was a way to identify Christ as pre-eternal with the God the Father. Indeed, later, it was declared by the