One Great Bull image from the "Hall of Bulls" in the cave of Lascaux is identified
as celestial by comparison of markings in the painting with known star groupings.
Speculation is pursued that the entire frieze (a composition) might have celestial interpretation. The frieze is
recognized as a picture of the star groups along the ecliptic which appeared from dusk to dawn at the season of
the summer solstice (ca. 15,000 B.C.) at the time Lascaux was painted. Two methods are then discussed for how
the star picture represented in the frieze could easily have been used in conjunction with the lunar phases to
keep track of the summer solstice and the passage of the summer season.