~6 min read • Updated Apr 2, 2026
Magical Environment of Christian Europe
The Romans at the height of their empire valued the practical aspects of science but had almost completely forgotten Greek theoretical sciences. Pliny’s Natural History contains superstitions on almost every page that clearly belong to the Middle Ages. Long before barbarian invasions blocked the highways of culture, Roman indifference combined with Christian laxity nearly dried up the sources of scientific thought.
What remained of Greek science was hidden in the libraries of Constantinople and suffered heavy damage during the sack of 1204. In the ninth century Greek sciences moved to the Islamic world through Syria. While Christian Europe struggled to free itself from barbarism and superstition, these sciences stimulated Muslim thought and created one of the most interesting cultural movements in human history.
Superstition, Demons, and Magic in the Middle Ages
Science and philosophy had to develop in an environment of legends, myths, miracles, augury, demons, strange creatures, sorcery, astrology, divination, and witchcraft. Even the most learned men such as Augustine and Abelard believed in the real existence of demons. Alfonso the Wise believed in magic and permitted astrology.
A vast number of mysterious beings inherited from pagan times entered Christianity. Souls of the dead walked in the air, werewolves roamed the forests, and spirits of unbaptized children appeared as will-o’-the-wisps. Archbishop Edmund Rich of Canterbury saw a flock of black crows and immediately identified them as demons carrying away the soul of a usurer.
To ward off demons and attract good fortune, people carried plants, stones, amulets, rings, and jewels believed to have magical properties. A horseshoe was considered lucky because it resembled the crescent moon. The number seven, representing the perfect human being (body and soul), was used for many purposes including the seven ages of man and the seven deadly sins.
The Church’s Struggle Against Witchcraft
The Church fought hard against ignorance and superstition, condemning many practices and prescribing penances. Black magic, or invoking demons to change the course of events, was rejected, yet it continued secretly. The book known as the Everlasting Curse listed the names and special powers of major demons.
Simple magic included reciting spells repeatedly. The sign of the cross, the Lord’s Prayer, and “Ave Maria” were often treated as magical incantations. The Bishop of Exeter’s penitential condemned women who claimed to change men’s minds through sorcery or who said they rode with demons on certain nights. These beliefs later became known as the Witches’ Sabbath. In 1298 the Inquisition officially began its campaign against witchcraft by burning witches at the stake.
Medicine and Its Connection with Magic
Medieval medicine was largely a branch of theology. Augustine taught that all human diseases were caused by demons. Physicians prescribed prayers, amulets, and the royal touch. Scrofula became known as the King’s Evil because kings, being consecrated, were believed to cure it by laying on of hands.
Divination methods such as augury, palmistry, and geomancy were used to predict the future. Astrology was taught in most universities, and physicians performed bloodletting according to the position of the moon.
Revolution in Mathematics
Leonardo Fibonacci of Pisa was the first great scientist of this period. In his book Liber Abaci (1202) he introduced Hindu numerals, the zero, and the decimal system to Europe. This work revived mathematics in the Latin Christian world and introduced Arabic algebra.
In his Practica Geometriae (1220) Fibonacci for the first time applied algebra to geometric problems. Despite initial resistance from merchants who preferred Roman numerals and the abacus, the new numerals gradually replaced the old ones.
Advances in Astronomy and Mechanics
Interest in astronomy continued due to navigation needs and astrology. Christian astronomers still followed Ptolemy’s system. The Alfonsine Tables represented one of the greatest contributions to Christian astronomy.
In mechanics, Jordanus Nemorarius studied the principles of weight and static moment. Mechanical clocks began to appear in the thirteenth century. In optics, Robert Grosseteste and Roger Bacon studied the refraction of light, which contributed to the invention of spectacles.
Earth Sciences, Geography, and Biology
Geology was the most backward of the natural sciences and heavily mixed with superstition. Geography advanced through Crusades and travelers such as Marco Polo. Marco Polo’s travel book provided the first detailed European description of China, Java, Sumatra, and other eastern lands.
In biology, Frederick II wrote a 589-page treatise on falconry based on direct observation and experiment. The belief in spontaneous generation of small creatures remained widespread.
Alchemy, Gunpowder, and Chemistry
Alchemy flourished after the translation of Arabic texts. The discovery of alcohol and mineral acids advanced chemistry. The earliest clear reference to gunpowder appears in the book Fire for Burning Enemies by Marcus Graecus around 1270.
Revival of Medicine and Surgery
The medical school of Salerno was the leading center of medicine. Later, universities of Bologna, Paris, and Montpellier made significant progress. Roger of Salerno wrote Practica Chirurgiae, the oldest surgical treatise in the Latin West. William of Saliceto and Lanfranc of Milan introduced important advances in surgery.
Hospitals expanded under Christian charity. Special attention was given to diseases such as leprosy and St. Anthony’s Fire.
Prominent Scholars: Albertus Magnus and Roger Bacon
Albertus Magnus is known for his extensive works in botany, zoology, and natural sciences. He emphasized experience but remained strongly influenced by Aristotle.
Roger Bacon stressed the importance of experience, mathematics, and languages. His Opus Majus is a vast compilation of the knowledge of his age. He made remarkable predictions about flying machines and the power of gunpowder.
Encyclopedists of the Middle Ages
Vincent of Beauvais compiled the greatest medieval encyclopedia, the Speculum Maius. These works combined science, philosophy, and theology, reflecting the encyclopedic spirit of the thirteenth century.
Written & researched by Dr. Shahin Siami