Mars

Popular astrology describes Mars as the planet of action, passion, and drive. That framing is vague enough to be useless as a working reference. The traditional terms are sharper: lesser malefic, dry, choleric, of iron, of Tuesday. Each descriptor arrived in the practitioner’s vocabulary from somewhere specific — from a centuries-long textual transmission running from the Hellenistic Mediterranean through Arabic scholarship into the Renaissance printing houses of Germany and the Low Countries.

This page traces that transmission and separates what the sources actually say from what modern shorthand implies.

The Hellenistic foundation

The classification of Mars as a malefic planet is documented as early as the second century CE in Claudius Ptolemy’s Tetrabiblos, the most widely transmitted astrological text of antiquity. Ptolemy’s framework is Aristotelian: each planet carries primary qualities drawn from the four-element schema of hot, cold, dry, and wet. Mars is characterized as primarily dry and secondarily hot — a profile that maps onto fire and the choleric humor, and that explains, in ancient terms, why Mars governs conflict, fever, burns, and instruments of cutting.

Within this same framework, the planets divide into benefics and malefics. Jupiter and Venus are the benefics (greater and lesser respectively); Saturn and Mars are the malefics. Saturn, cold and dry, is the greater malefic. Mars, hot and dry, is the lesser. The lesser/greater distinction is not merely qualitative — it also maps onto the doctrine of sect, one of Hellenistic astrology’s central organizing principles.

Sect divides every chart into a daytime or nighttime condition based on whether the Sun was above or below the horizon at birth. In a day chart, Saturn is the more contained malefic; Mars operates against the grain of the chart’s dominant light and becomes the harder of the two. In a night chart, positions reverse: Mars is in sect and tempered; Saturn becomes the less moderated force. The practical implication for Renaissance magical timing — which inherited and extended these sect categories — is that Mars’s nature is relational as well as fixed. When the planet is invoked matters alongside what it governs.

Agrippa’s tables and the systematized correspondence list

The clearest single source for how Mars correspondences entered practical magic as a coherent system is Heinrich Cornelius Agrippa von Nettesheim’s De Occulta Philosophia (Three Books of Occult Philosophy). The first book appeared in print in 1531; the complete three-volume work had circulated in manuscript from around 1509–10 and was published in full in 1533. Agrippa drafted it at twenty-three.

Book II — the celestial volume — is where the correspondence tables live. Agrippa organizes the heavens through the seven classical planets in the Chaldean order (Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon) and for each produces a structured list: the governing day, governing hour, metals, stones, herbs, animals, body parts, angels, and spirits aligned with it. The list is not Agrippa’s invention; he draws on Marsilio Ficino, on Arabic astrological transmission, and ultimately on the Hellenistic sources those texts preserved. What Agrippa does is consolidate and cross-reference these lists into the form that every subsequent European magical manual, from the Renaissance grimoires through the twentieth-century revival handbooks, would borrow from.

Mars’s table, in Agrippa’s system, assigns:

• Day: Tuesday
• Metal: iron
• Color: red
• Number: 5 (the order of the Mars magic square)
• Governing qualities: hot and dry
• Sphere of operation: war, victory, strength, courage, the halting of blood, juridical proceedings

Several of these are stable across the entire tradition. Iron is Mars’s metal from antiquity — the metal of weapons and the cutting edge. Red is the planet’s color in every system that assigns planetary colors, drawn in part from the planet’s reddish appearance in the night sky and in part from the visual vocabulary of blood and fire. Tuesday derives from the Chaldean hour assignment described below.

The kamea: Mars’s magic square

The most technically precise element in Agrippa’s Mars section is the kamea — the planetary magic square. Agrippa presents one for each of the seven planets, scaled by the planet’s position in the Chaldean order. Saturn, first in sequence, receives a 3×3 square; Jupiter a 4×4; Mars a 5×5.

The Mars kamea is a 5×5 grid containing the integers 1 through 25, arranged so that every row, column, and main diagonal sums to 65. The total of all integers in the square is 325. That total is not coincidental: 325 is also the Hebrew gematric value of Graphiel, the intelligence of Mars (the planet’s directing rationality, invoked for beneficial influence), and of Bartzabel, the spirit of Mars (the planet’s active force, invoked for operative work). Both names resolve to 325 under the gematric system Agrippa uses, tying the sigils derived from the square back to the square’s structural constants and making the whole apparatus self-consistent as a system.

Agrippa is explicit about the operative purpose: the kamea, engraved on an iron plate or sword, “makes a man potent in war, and judgments.” The choice of iron as the engraving substrate is not decorative — iron is the Mars metal, and the talismanic logic of the tradition requires that material and planetary attribution align. Engraving the Mars kamea on silver would put Mars’s square on the Moon’s metal, producing a contradiction the system cannot absorb.

The sigils for Graphiel and Bartzabel are derived by tracing a continuous line across the kamea, moving from square to square in the order of each letter’s numerical value. The resulting sigils appear on Mars talismans alongside the kamea itself — the square as numerical structure, the sigil as its derived signature.

Tuesday and the planetary week

Tuesday is Mars’s day. The English name derives from Old English Tīwesdæg, the day of Tiw (also Tyr), the Germanic war god whom medieval translators mapped onto Mars — the same interpretive alignment that gives the French mardi (from Latin Martis dies, the day of Mars) and the Spanish martes.

The assignment of planets to days runs directly through the planetary hour system. Each day consists of twenty-four hours, with each hour governed by one of the seven classical planets cycling through the Chaldean order (Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon, then repeating). The day takes the name of the planet that governs its first hour at sunrise. Working through the Chaldean sequence from Sunday: if Sunday’s first hour belongs to the Sun, then Monday’s first hour belongs to the Moon, Tuesday’s to Mars, Wednesday’s to Mercury, Thursday’s to Jupiter, Friday’s to Venus, Saturday’s to Saturn. The seven-day planetary week is not an astrological convenience — it is a mechanical consequence of this hour cycle, which itself predates the Julian calendar reform.

Planetary hours extend this logic into finer timing. The first hour after sunrise on any Tuesday is governed by Mars; the eighth hour of a Tuesday falls to the Sun; the fifteenth to Venus. This means Mars hours are not confined to Tuesdays. A Thursday (Jupiter’s day) contains Mars hours within it; so does every other day of the week. Practitioners using traditional planetary timing can therefore identify multiple Mars windows in any given week without waiting for the next Tuesday.

To work out the hours: calculate local sunrise, divide the arc from sunrise to sunset into twelve equal parts (the diurnal hours), and divide sunset to next sunrise into twelve more (the nocturnal hours). These segments are unequal by clock time except at the equinoxes. The first diurnal hour on Tuesday belongs to Mars; step forward through the Chaldean order for each subsequent hour.

What “martial” actually means

Every element in the Mars correspondence cluster — iron, red, Tuesday, the 5×5 kamea, the Chaldean hour cycle, Graphiel, Bartzabel — arrives in the practitioner’s hands through a documented textual chain. The chain runs from Hellenistic astrology (principally the framework codified in Ptolemy’s Tetrabiblos and its contemporaries), through Arabic astronomical and astrological transmission in the ninth through eleventh centuries, into Ficinian Neoplatonic synthesis in the fifteenth century, and from there into Agrippa’s consolidation in the sixteenth. The full three-volume De Occulta Philosophia is effectively the master index of that transmission, and it is the direct source for most of what subsequent grimoires and modern practitioners repeat under the heading of “Mars correspondences.”

The system is constructed. That is not a criticism; it is a description. A set of analogical relationships was assembled from distinct ancient sources and organized into a coherent grid by Renaissance scholars making the best available synthesis of inherited knowledge. When a modern practitioner works a Mars operation on a Tuesday, during a Mars planetary hour, using iron and red, they are working a Renaissance ceremonial technology with a traceable history — not a folk inheritance, not a shamanic tradition, not an independent cross-cultural survival. The distinction matters for honest practice, and it matters especially when evaluating claims that “Mars energy” is a universal or natural category. It is a specific cultural construction with a specific textual history. Both the technology and the distinction are worth knowing.

In practice

For timing: the next Tuesday is the first window; the next Mars planetary hour in any week is the second. An astronomical almanac or a planetary hours calculator (inputs: date, latitude, longitude) produces the hour boundaries. On Tuesdays, Mars governs the 1st, 8th, 15th, and 22nd hours in the standard Chaldean rotation. On other days, the same sequence shifts by the day’s ruling planet.

For materials: iron is the canonical Mars metal in the Western ceremonial tradition. Agrippa specifies iron plate or sword as the substrate for the kamea. A worked iron surface — a cast nail, a blade, a flat piece of cold iron — is the appropriate material link. Copper belongs to Venus, silver to the Moon, gold to the Sun; substitute materials introduce a different planetary register.

For color: red throughout this tradition. Red cloth, red candles, red ink for the kamea’s numbers. The color carries the same correspondence logic as the metal: using blue (Moon/Venus) or yellow (Sun) for a Mars working creates a symbolic incongruence the system registers even if you do not.

For scope: Agrippa’s own enumeration of the kamea’s operative domain covers potency in conflict and legal proceedings, victory against adversaries, and the halting of blood. The last item is worth attention: it is Mars’s cutting quality directed against its own outcome — the same hot-dry principle that opens a wound, here turned toward closing one. The tradition reads this as consistent rather than paradoxical. Mars governs iron; iron both wounds and sutures.

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Cross-references on this site: forthcoming — iron correspondence, Jupiter, Saturn, planetary hours.