Roger Bacon

Medieval English polymath and early advocate of empiricism

Roger Bacon (c. 1219/20 – c. 1292), known by the scholastic accolade Doctor Mirabilis, was a medieval English polymath, philosopher, scientist, theologian, and Franciscan friar who placed considerable emphasis on the study of nature through empiricism. Intertwining his Catholic faith with scientific thinking, he is regarded as one of the greatest polymaths of the medieval period and an early European advocate of the modern scientific method, alongside his teacher Robert Grosseteste.

Bacon applied the empirical method of Ibn al-Haytham (Alhazen) to observations in texts attributed to Aristotle, and he discovered the importance of empirical testing when his results differed from Aristotelian predictions. His linguistic work is noted for an early exposition of a universal grammar, though 21st-century re-evaluations stress that he remained essentially a medieval thinker, with much of his "experimental" knowledge derived from books in the scholastic tradition.

He was partially responsible for revising the medieval university curriculum, notably adding optics. His major work was sent to Pope Clement IV in Rome in 1267 at the pope’s request. Although gunpowder was first invented in China, Bacon was the first in Europe to record its formula. Born in Ilchester, Somerset, in the early 13th century, he studied at Oxford, became a Master there lecturing on Aristotle, and later taught at the University of Paris.

In 1256 or 1257, he became a Franciscan friar. His activities were later restricted by a statute prohibiting his order from publishing without prior approval, and he sought patrons to fund his return to Oxford.

Last updated 2026-09-28 from the source article.

Quick Facts

Region

Western philosophy

Era

Medieval philosophy

Other names

Doctor Mirabilis

Birthplace

near Ilchester, Somerset, England

Place of death

near Oxford, Oxfordshire, England

Alma mater

University of Oxford

School of thought

Scholasticism

Main interests

Theology; Natural philosophy
Natural sciences
Chemistry
Biology
engineering
Mathematics
Astronomy

Facts from the source article.

Background

Bacon was born in Ilchester, Somerset, England, in the early 13th century; his birth date is uncertain, with the only source being a statement from his 1267 Opus Tertium. He studied at Oxford and became a Master there, lecturing on Aristotle. He taught at the University of Paris from 1237 or later, then left in 1247 or soon after. He became a Franciscan friar in 1256 or 1257. By the mid-1260s, he sought patrons and, through Guy de Foulques (later Pope Clement IV), was commissioned in 1266 to write. He sent the Pope his Opus Majus, Opus Minus, and other works in 1267 or 1268. After Clement's death in 1268, Bacon lost his protector; he may have been imprisoned or placed under house arrest around 1277–1278, though this is disputed. He returned to the Franciscan House at Oxford sometime after 1278 and died around 1292.

Did You Know?

Bacon's family were considered royal partisans during the Second Barons' War, leading to their property being seized.
He was fluent in several languages and noted corruptions in scripture and Greek philosophical works due to mistranslation.

Notable Quotes (Wikiquote)

"Mix together saltpetre, luru vopo vir con utriet [powdered charcoal], and sulphur, and you will make thunder and lightning, if you know the method of mixing them." — Roger Bacon

"Many secrets of art and nature are thought by the unlearned to be magical." — Roger Bacon

"Reasoning draws a conclusion and makes us grant the conclusion, but does not make the conclusion certain, nor does it remove doubt so that the mind may rest on the intuition of truth, unless the mind discovers it by the path of experience." — Roger Bacon

"If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knowledge in mathematics..." — Roger Bacon