On the banks of the Nile, hundreds of temples honored the gods of the beloved country: Ra the Sun, Osiris the Moon, Ptah the Creator, Hathor and Isis the two aspects of woman, and many others that enlightened the thought of the priests who were essentially turned towards the sacred. For the past twenty years, thanks to the restorers of the Egyptian Antiquities Service, the walls have been coming out of the shadows, and several temples have regained their colors, Karnak, Esna and, the most beautiful of all, Dendara. This book is devoted to the most attractive part of this temple: the astronomical ceilings of the pronaos; it is an eternal sky, designed and painted 2000 years ago, a universe of knowledge and beauty.