The second triad is composed of Jupiter, Juno and Minerva.
Jupiter (see "The Firts Triad")
Juno (Female polarity) - Jupiter (male polarity)
Juno is the sacralization of birth (in very broad sense) and delivery: Calendae are sacred to Juno.
Like Jupiter, Juno has a long list of appellations (Indigitamenta) among which Juno Lucina (“She taking child to the daylight”) is one of the most important. Fecundity and anything can be expression of “Feminine” are typical sacred aspects of Juno.
Juno is also Regina (Queen) to describe her role as Female (political, magical and religious) Authority. In this way a Pater Familias and a Mater Familias are the human representation of the Jupiter/Juno Authority within the family. Her denomination as Juno Mater is something more than “Mother” in the common sense just considering the important role of the ancient festivity of Matronalia. She is the sacred “Fecundity”. In the same time she is also Juno Sospita or the female polarity of war activities.
In this way Juno has a triple functional sphere: sacred authority, sacred force and sacred fecundity.
Juno is also named “Juno Moneta” or “She warning” or “She giving good advices”.
Broken rings or knots are particularly nefas when invoking Juno or when entering sites sacred to Her.
Sacred animal to Juno are: the crow, the goose, the white heifer. Sacred plants to Juno are: the oak and the olive tree.
Minerva (female polarity) – Poseidon then Neptune (in the lectisternium) (male polarity)
Minerva is the sacralization of “craft” and “know-how”, any “intellectual activity”, the “practical skill” (sollertia). She is also “the art and intelligence of war”, the “Astuteness”, the “Reason”, the “Invention” and the “Rational Thought”. Also for this reason she is symbolized by a bronze shining armour (solidity of the rational thought).
In the Ancient Calendar there are no specific festivities dedicated to Minerva except for the march 19th: the artificum dies. She has essentially private cults. Craftsmen are “the Minerva’s Hands”.
Sacred animals to Minerva are the owl and the horse. Her symbols are the bronze armour, the eye, the sight. Other important symbols are the bit and the rudder as symbols of rational control over savage and uncontrolled forces.