Four Angles
greek: Ἀνατολή (Anatole, East) / Δύσις (Dysis, West) / Μεσουράνημα (Mesuranima, Meridian) / Ὑπόγειον (Hypogeion, below the Earth) · latin: cardines — Ascendens / Descendens / Medium Coelum / Imum Coelum
Definition
The four cardinal points of the natal chart — Ascendant (rising), Descendant (setting), Medium Coeli (Midheaven, MC) and Imum Coeli (lower meridian, IC) — formed by the intersection of the local horizon and the local meridian with the ecliptic. Together they divide the zodiac into four quadrants and supply the structural frame for the twelve houses.
In Tradition
Across the tradition the angles are the structural skeleton of the chart. Bram's *Mathesis* introduction records the Hellenistic system Firmicus uses: the zodiac is divided into quadrants by four cardines (sg. cardo), 'now known as angles' — the eastern point is the ascendant, its opposite the descendant; the highest point is the Medium Coelum, the lowest the Imum Coelum. Firmicus glosses the Greek names (Anatole, Dysis, Mesuranima, Hypogeion) and notes the ascendant was anciently called the horoscopus.
In Practice
Practitioners treat the angles as the most powerful natal points after the luminaries themselves. Planets in close orb of any angle — particularly the Ascendant and MC — are read as carrying angular accidental dignity and as expressing more visibly than the same planet would in cadent or succedent placement. The angles are the targets of transits, progressions, and directions: a slow body transiting the Ascendant degree marks an extended period of identity-foregrounding; transiting the MC marks an extended period of vocational or status foregrounding. The angles also frame the four quadrants and the two hemispheres (above/below horizon; eastern/western half) that supply higher-level chart-shape analyses.
Historical Origin
The cardines are documented from the earliest Hellenistic Greek sources (Anatole, Dysis, Mesuranima, Hypogeion — Firmicus's gloss preserves the Greek vocabulary) and stand at the structural foundation of the twelve-house Hellenistic chart. Bram's translation of Firmicus's *Mathesis* (4th c. CE) gives the canonical four-cardo definition. The doctrine carries forward unchanged through the Arabic, medieval Latin, and modern Western traditions — the names and computational machinery have shifted but the four-angle frame is invariant.
Etymology
Origin: Latin. Meaning: cardo (hinge / pivot) — the points on which the chart turns.
Further Reading
- Firmicus Maternus, Mathesis
- Claudius Ptolemy, Tetrabiblos