Catherine de' Medici

Catherine de' Medici was a Florentine noblewoman who became the most powerful woman in sixteenth-century Europe, and one of its most contested. Married at fourteen to the future Henry II of France, sidelined for years while his mistress held sway, she seized real authority only in widowhood, ruling as regent and adviser through the reigns of three sons and an age of near-constant religious war.

Her Taurus Sun in the first house is the foundational bull: a grounded, tenacious pillar of fixed values and unshakeable opinions, born to hold a solid foundation at all costs. That immovable will kept the House of Valois on the throne; it also hardened, over years of frustration, into the ruthlessness her own letters record.

Her Aries Ascendant, the ram's martial mask, reads analytically as combative first-mover energy, a will to strike and lead. Her Libra Moon speaks of a Venusian nature drawn to diplomacy, patronage and beauty, and early on she did compromise and negotiate. But the sixth-house placement bound her peace of mind to control and daily crisis management, and the diplomacy curdled.

She bears blame for hardline persecution of the Huguenots, above all the St. Bartholomew's Day massacre of 1572, in which thousands were killed. A chart describes temperament; it never excuses such choices.