Juan de Herrera was a Spanish architect, mathematician and geometrician.
One of the most outstanding Spanish architects in the 16th century, Herrera represents the peak of the Renaissance in Spain. His sober style reached full development in buildings like the Monastery of San Lorenzo de El Escorial. The Herrerian style was named after him, and was representative of the architecture of the Spanish Empire of Philip II and his Austrian successors.
Herrera was interested in many branches of knowledge. His Discurso sobre la figura cúbica tells us about his notable knowledge about geometry and mathematics. He participated in the military campaigns of Charles V in Germany, Flanders and Italy.