The Zodiac is a circle of constellations in the sky. How does one mark the beginning of a circle? But the Temple at Esna, near Luxor Egypt, shows the Zodiac linearly. The Esna Zodiac shows how the ancients marked the start and the end of the Zodiac. Below is the Esna Zodiac, showing the Zodiac constellations moving in a procession from right to left in the lower level with the procession on the upper level moving from left-to-right behind (following the U-turn arrows).
The Sphinx leads the procession of constellations. Sphinx means ‘to bind together’ and is a woman’s head joined to a lion’s body (the first and the last of the zodiac procession fused together). Directly after the sphinx comes Virgo, the first constellation in the zodiac procession. The zodiac constellations then follow Virgo in standard sequence with the last constellation, at the upper left, being Leo. The Esna Zodiac shows where the zodiac began (Virgo) and where it ended (Leo).