The Third Decan of Capricorn

This is the third ten-degree segment of Capricorn, the cardinal earth sign, spanning 20 to 30 degrees. Its ruler in the Chaldean order of faces is the Sun, following the continuous sequence of the seven planets around the thirty-six decans. The decan is the oldest layer of astrology, the thirty-six having begun as Egyptian star groups used to divide the year and the night, absorbed into the zodiac as ten-degree arcs only in the last centuries BCE.

The Golden Dawn, from 1888, mapped the numbered minor cards onto the decans in zodiacal order; this segment carries the Four of Coins, to which they gave the title Power or Earthly Power, its Sun-in-Capricorn attribution taken from the face ruler, the sun's authority on the ambitious earth sign matching the card's image of consolidated, tightly held wealth. That tarot layer is a modern Western overlay on the ancient decan scheme rather than part of the inherited tradition.