Paul Helleu, a French artist, painted the constellations, complete with the zodiac signs, on the ceiling in Grand Central Station. He took the imagery from a Medieval manuscript. Centuries before, travelers looked to the stars in order to find their traveling path. When Grand Central Station was built, trains and railroads replaced the need to travel by the stars. The constellations, however, remain fixed on the ceiling of Grand Central; they remind travelers of the way things were and the progress that has come.