A piece of medieval wisdom

10 medieval inventions that changed the Western world

The idea that the Middle Ages were a time of ignorance and technological stagnation is widespread, but nothing could be further from the truth, especially considering that the medieval period lasted nearly 10 centuries.

Although the first few centuries of the medieval period were marked by chaos due to the collapse of the Western Roman Empire and the birth of new nations, many technological advances during the Middle Ages contributed to shaping the modern world.

Humanity has been trying to measure time since the beginning of history. Ancient civilizations developed several types of clocks—some more accurate than others—such as sundials, hourglasses, and water clocks.

Fully mechanical clocks appeared in the 13th century, usually installed in church towers, and were equipped with bells to announce the passing of hours. More advanced versions also featured hands to display the time.

Growing the same crop repeatedly on the same plot of land leads to the soil losing nutrients and becoming unproductive. Farmers were aware of this and had been using crop rotation in a two-field system since antiquity: they would sow half of the land and leave the other half to rest. The following year, the roles would be reversed, ensuring the soil remained fertile.

In the 8th century, medieval farmers started dividing the land into three parts: one was planted with winter crops (sown in the fall), another with spring crops such as legumes, and the third was left to rest. This new method not only increased the harvest, but the greater diversity of crops improved overall nutrition due to the greater diversity of food.

There are records of visual aids used in ancient Rome and Greece, often made from precious stones like emeralds, and Arabic sources describe the use of magnifying glasses. However, the first pair of eyeglasses was developed in Italy in the mid-13th century. These early glasses had convex lenses, meaning they were only useful for farsighted individuals. Glasses with concave lenses, suitable for nearsightedness, would not be developed until the 15th century.

The existence of prestigious learning centers in antiquity is well documented, but universities as we know them are a medieval development. In the chaos of the early Middle Ages, Christian monasteries preserved and transmitted classical knowledge, becoming centers of education and research.

The University of Bologna, founded in 1088, is considered the first institution to be academically independent and to award higher education degrees to both clergy and laypeople.

While humans had already been using grindstones to sharpen knives and weapons for centuries, they used a static stone, which required a significant effort for the person doing the sharpening.

The earliest known record of a rotating grindstone machine operated by a lever dates to the 8th century. By the 14th century, a pedal-and-crank mechanism had been incorporated, allowing for better control of the speed and making the sharpening process much easier.

Ancient mariners and travelers used the stars and other natural landmarks to determine their geographic position, but this method depended on good weather and clear skies. By the 13th century, some records describe sailors using a magnetized needle floating in water to point north.

The modern, round compass is often attributed to the Italian sailor Flavio Gioia in the early 14th century. He is said to have combined the floating needle with a wind rose and encased it in a box, making it portable, reliable, and easy to use.

Many people believe Gutenberg to be the inventor of the printing press, but woodblock printing dates back to ancient China, and the screw press had already been introduced by the Romans in the 1st century. By Gutenberg’s time, paper presses were widely used in Europe, but what was groundbreaking were the changes he introduced to the printing process.

Gutenberg modified the basic paper press to mechanize it and ensure even pressure across the paper surface. He also developed a system of movable type, which allowed the press to reproduce any text at a higher speed. He is also credited with the development of an oil-based ink, more suitable for paper printing than the traditional water-based ink.

The ancient Greeks and Romans developed central heating systems that relied on hot air traveling through pipes, but these systems disappeared after the fall of the Roman Empire. During the medieval period, Christian monks living in the Alps developed a new system that used underfloor channels to carry heat from a furnace. By the 13th century, monasteries in Spain started using water to carry heat, in the same way that some of the modern heating systems do.

Although the Romans had created industrial chimneys for their bakeries, true domestic chimneys and fireplaces were developed in the Middle Ages to allow people to cook indoors and heat their homes safely. These early chimneys were wider than modern chimneys to allow more heat to remain in the room, and had a cap to cover the chimney top in case of downdrafts. Though it’s worth noting that domestic chimneys became more common around the 12th–13th centuries in Europe.

Fire has long been used as a weapon during wars, especially to burn down fortresses and ships. However, fire can be easily countered with water or other fire-retardant materials.

In the 7th century, during the Muslim sieges of Constantinople, the Byzantines reportedly used an incendiary weapon developed by an architect named Callinicus. This formula produced a substance that could burn even on water, helping the Byzantines repel the enemy navy. Greek fire is considered a precursor to modern incendiary weapons, influencing the development of devices like the hand grenade.

Some names stick around

From Table Tap Joe to Ziggy Stardust: Who are the best song characters?

Sometimes, a character is the perfect alter-ego to write a song about oneself without self-referencing so much. Other times, a character is just a character. Over the years, musicians have come up with lonely dreamers, fearless heroes, mysterious strangers, and even supernatural villains who have become just as famous as the songs themselves. Some were inspired by real people, others sprang entirely from imagination, but all of them left a lasting mark on music history. Which of these 12 do you remember?

Tom Waits has always had a soft spot for society's oddballs, and few are even stranger than Table Top Joe. Introduced on the 2002 album Alice, Joe is born with only a head and hands, yet grows into a brilliant piano player whose extraordinary talent earns him fame despite the odds stacked against him.

The song unfolds like a forgotten American folk tale, complete with references to Coney Island's legendary Dreamland amusement park and composer Igor Stravinsky. Although many listeners assume the story is based on an old carnival legend, Table Top Joe is entirely Tom Waits' own creation.

Few fictional musicians have ever become as famous as Ziggy Stardust. Introduced in 1972, Ziggy is an alien rock star sent to Earth shortly before humanity's end, only to be consumed by the very fame that makes him a savior to millions.

David Bowie blurred the line between fiction and reality by performing as Ziggy onstage for more than a year. When he unexpectedly announced Ziggy's retirement during a concert at London's Hammersmith Odeon in 1973, many fans believed the character, and perhaps Bowie himself, had truly reached the end of the story.

Tommy Walker isn't just the hero of a song, he's the central figure of one of rock music's first great operas. After witnessing a traumatic event as a child, Tommy becomes deaf, mute, and blind, yet somehow develops astonishing pinball skills that transform him into an unlikely celebrity.

Pete Townshend built an entire musical world around Tommy, exploring themes of trauma, faith, and redemption. First released in 1969, Tommy later became a hit film, a Broadway production, and one of the most influential concept albums ever recorded.

Johnny B. Goode is every aspiring musician's dream. Growing up in rural Louisiana with little more than a guitar and natural talent, he plays so brilliantly that listeners predict "his name will be in lights."

Chuck Berry based the character partly on himself and partly on pianist Johnnie Johnson. Originally described as a "colored boy," Johnny became a "country boy" in the final lyrics, making the song more likely to receive airplay during the segregation era. Nearly two decades later, Johnny's anthem would even travel into space aboard NASA's Voyager Golden Record.

Few fictional characters have captured loneliness as powerfully as Eleanor Rigby. She quietly moves through life unnoticed, while Father McKenzie delivers sermons that no one hears, creating one of popular music's saddest portraits of isolation.

Paul McCartney later explained that Eleanor's name came from actress Eleanor Bron and the Liverpool shop Rigby & Evens. The discovery of an actual Eleanor Rigby gravestone in Liverpool only deepened the song's mystique, though McCartney maintained the coincidence was unintentional.

Billie Jean may be one of pop music's most famous women, yet Michael Jackson insisted she wasn't a real person. Instead, she represented several women who falsely claimed that he had fathered their children during the height of the Jackson 5's fame.

Released in 1983 as part of Thriller, the song became a global phenomenon. It also provided the stage for Jackson's legendary moonwalk during Motown 25.

Unlike many legendary song characters, Stagger Lee actually existed. His real name was Lee Shelton, a St. Louis criminal who murdered Billy Lyons during an argument over a hat on Christmas Eve in 1895.

The shocking crime quickly entered American folklore through countless folk songs before Lloyd Price transformed it into a chart-topping hit in 1958. More than a century later, Stagger Lee remains one of the most enduring antiheroes in American music.

Tom Dooley was inspired by Thomas Dula, a Confederate veteran executed in North Carolina in 1868 after being convicted of murdering Laura Foster. His surname was locally pronounced "Dooley," giving the ballad its familiar title.

The Kingston Trio revived the old Appalachian folk song in 1958, turning it into an international hit and helping launch America's folk music revival.

When the narrator of "Lola" meets an intriguing stranger in a Soho nightclub, expectations quickly give way to surprise. Ray Davies crafted one of rock's earliest mainstream stories exploring gender ambiguity, decades before the topic entered popular conversation.

The recording rarely reached British radio. Because BBC rules prohibited commercial product names, Davies had to interrupt a U.S. tour and fly back to London simply to replace the lyric "Coca-Cola" with the now-famous "cherry cola."

Unlike most famous song characters, the Piano Man is really Billy Joel himself. Before becoming a superstar, Joel spent six months in 1972 and 1973 performing under the pseudonym Bill Martin at the Executive Room, a piano bar in Los Angeles, after becoming trapped in a bad recording contract. The song transforms those experiences into a bittersweet portrait of ordinary people searching for escape at the end of another week.

Joel has said that virtually every character in the song was based on a real person, from bartender John to "Paul, the real estate novelist" and Davy, who really was in the Navy. Yet the Piano Man himself became the story's most enduring character: a quiet observer who offers music as a brief refuge for dreamers, lonely souls, and regulars alike. More than fifty years after its 1973 release, "Piano Man" remains Billy Joel's signature song, and its title has effectively become his lifelong nickname.

Standing nearly seven feet tall and missing an arm, Amos Moses roams the Louisiana swamps hunting alligators. Jerry Reed filled the song with colorful Southern expressions and exaggerated storytelling that make Amos feel like an authentic folk legend.

Although fictional, Amos embodies the larger-than-life heroes found throughout American tall tales. His adventures turned the song into one of Reed's biggest crossover hits and secured Amos a permanent place among country music's greatest characters.

Big Bad John hardly says a word, but he doesn't have to. The towering coal miner earns everyone's respect through quiet strength before sacrificing his own life to save fellow workers when a mine collapses.

Jimmy Dean's 1961 ballad became a smash hit, winning a Grammy and inspiring several sequel songs. More than sixty years later, Big Bad John still stands as one of country music's defining working-class heroes.