Triplicity Ruler

trip-LIS-ih-tee ROO-ler

Definition

A triplicity ruler is a planet given charge of one of the four elemental triplicities — Fire, Earth, Air, Water — under a scheme that shifts with sect (day or night birth). The Dorothean three-ruler system gives each triplicity a day ruler, a night ruler, and a participating (cooperating) ruler. Fire: Sun day, Jupiter night, Saturn participating. Earth: Venus day, Moon night, Mars participating. Air: Saturn day, Mercury night, Jupiter participating. Water: Venus day, Mars night, Moon participating. Lilly’s simplified Renaissance scheme keeps just two rulers per triplicity by dropping the participating one.

In Tradition

For Hellenistic and traditional Western astrologers, triplicity is the third essential dignity — worth +3 in the Lilly tally, behind domicile at +5 and exaltation at +4. The three triplicity lords also act as time-lords, splitting a life into thirds: read the triplicity lords of the chart’s sect light in order, and the day ruler governs the first part, the night ruler the middle, and the participating ruler the final part.

In Practice

Astrologers use the triplicity rulers in two ways: as a dignity score for any planet sitting in its own triplicity (worth +3 in the Lilly tally), and as a thirds-of-life time-lord scheme, applied especially to the triplicity lords of the sect light. The Dorothean method (Carmen Astrologicum I-II) examines the placement, dignity, angularity, aspects, and reception of each of the three sect-light triplicity lords in turn — a strong day lord points to a good early life, a strong night lord to a good middle, a strong participating lord to a good late life. Bonatti (Liber Astronomiae, Tractate II) keeps this thirds scheme and applies it to individual house topics. Triplicity also feeds the almuten: when adding up the dignity tally at a given degree, triplicity hands +3 sect-aware points to whichever planet rules the triplicity of that degree under the right day or night assignment.

Historical Origin

The three-ruler triplicity scheme is attested in the Carmen Astrologicum of Dorotheus of Sidon (1st century CE), elaborated by Vettius Valens (Anthologiae) and Ptolemy (Tetrabiblos), and passed through Arabic compilations to Bonatti (Liber Astronomiae, c. 1277, Tractate II). Lilly’s Christian Astrology (1647) adopts the simplified Ptolemaic two-ruler scheme. The modern revival of the three-ruler Dorothean form runs through Lehman (Essential Dignities) and the Project Hindsight translations.

Further Reading