The Catholic Church was the dominant institution across 16th-century Europe, influencing every sphere:
Sole authorized interpreter of Christianity (pre-Reformation); defined doctrine, sacraments, liturgy, morality. Parish structure organized daily life.
Primary patron: cathedrals (St. Peter's), palaces, altarpieces, sculpture, music (Palestrina), painting (Michelangelo, Raphael). Visual theology for illiterate masses.
Hospitals, orphanages, poor relief, convents — run by orders (Franciscans, Dominicans, Jesuits, Sisters of Charity).
Spanish, Roman, Portuguese Inquisitions targeted heresy, conversos, Protestants, witches — judicial terror.
Luther (1517), Calvin, Zwingli, Henry VIII fractured unity → Protestantism, Counter-Reformation (Trent 1545–63), religious wars.
The Church was not just a religious body—it was the framework of European civilization until the Reformation and rise of the nation-state.