Antonio Torres of Spain establishes the modern classical guitar design

Story: 1850 C.E.  |  Last updated: January 1, 1850

Sometime around 1850 C.E., a carpenter and guitar maker in southern Spain quietly solved a problem that luthiers had wrestled with for centuries: how to make a guitar loud enough, resonant enough, and structurally sound enough to fill a room with music. Antonio de Torres Jurado did not publish a manifesto or file a patent. He just built guitars — and in doing so, set the template that every classical guitar maker in the world still follows today.

What the evidence shows

• Classical guitar design: Torres enlarged the guitar body, adjusted its proportions, and introduced the fan bracing pattern — an arrangement of wooden struts inside the top of the instrument that distributes string tension and shapes how sound resonates and projects.
• Fan bracing pattern: The internal structure Torres pioneered determines not just durability but tone quality, sustain, and volume — meaning his engineering choices are literally inside nearly every classical guitar played on a concert stage today.
• Guitar body proportions: Torres’ specific measurements — the wider lower bout, the narrower waist, the longer scale length — became the standard blueprint that Spanish and international luthiers adopted within decades of his first instruments.

A long road to one defining design

The guitar did not appear from nowhere. Stringed instruments have been central to human music-making for at least 3,500 years. The oldest guitar-like instrument on record belonged to an Egyptian court singer named Har-Mose, and it can still be seen at the Museum of Egyptian Antiquities in Cairo. Persian chartars, Ancient Greek kitharas, and the lutes of Moorish Spain all contributed to an evolving family of instruments.

Research by physicist and guitar historian Dr. Michael Kasha in the 1960s helped clarify that the modern guitar’s lineage runs most directly through the Moorish oud — a rounded, fretless lute — rather than from the bowl harps of the ancient world. That lineage traveled through Islamic Iberia into Spanish craft traditions, where luthiers across several centuries gradually shaped the instrument toward what Torres would ultimately perfect.

By the early 19th century C.E., guitars were widely played across Europe, but they remained relatively quiet instruments with inconsistent sound quality. The internal bracing structures of the time — simple ladder patterns running perpendicular to the strings — limited how much the top could vibrate and amplify sound. A more elegant solution was waiting to be found.

What Torres actually changed

Torres worked primarily in Seville and Almería. He was not an aristocrat or a formally trained scientist — he came up through carpentry and applied his understanding of wood and tension to a practical problem. His fan bracing design arranged wooden struts in a radiating pattern beneath the soundboard, allowing the entire top to flex and sing rather than just the area directly beneath the strings.

The results were immediately audible. Contemporaries noted that Torres guitars produced a fuller, richer tone with significantly more projection than earlier instruments. Leading Spanish guitarists of the era — including Francisco Tárrega, sometimes called the father of classical guitar technique — played Torres instruments and helped spread his design’s reputation across Europe.

Torres also standardized the guitar’s physical dimensions in ways that had not been systematically defined before. His choices about body width, depth, and scale length were not arbitrary; they reflected an intuitive understanding of acoustics that later scientists and luthiers would confirm was remarkably well-calibrated. Smithsonian Magazine has noted that Torres guitars represent one of the clearest examples of a craftsman arriving at near-optimal engineering through observation and experimentation rather than formal theory.

A simultaneous revolution across the Atlantic

While Torres was working in Spain, a parallel development was unfolding in the United States. German immigrant Christian Frederick Martin, who had made his first guitar in the U.S. around 1830 C.E., was developing a different internal structure: the X-brace. Where Torres’ fan bracing suited gut strings and the classical tradition, Martin’s X-bracing would prove better suited to the higher tension of steel strings, which became common after 1900 C.E.

The two designs — fan bracing and X-bracing — effectively split the guitar world into its two major branches: classical and steel-string acoustic. Both remain in use today, largely unchanged in their fundamental principles. This convergence of independent innovations on two continents, driven by different cultural musical needs, produced an instrument family of extraordinary range and versatility.

Decades later, musician George Beauchamp recognized that even the best acoustic guitars couldn’t compete with the volume of a brass band. Working with electrical engineer Adolph Rickenbacker and business partner Paul Barth in the late 1920s C.E., he developed electromagnetic pickups that converted string vibration into electrical signal — and the electric guitar was born. Britannica traces this lineage directly back through the acoustic tradition that Torres had defined.

Lasting impact

The classical guitar design Torres established in 1850 C.E. is not a historical curiosity. It is the active standard. Every major classical guitar manufacturer in the world — from Spain’s traditional Almería workshops to luthiers in Japan, Brazil, and the U.S. — builds on the proportions and internal structure he introduced. Concert performers, recording artists, and students on every continent play instruments that are essentially refinements of Torres’ original blueprint.

Beyond the instrument itself, Torres’ work helped elevate the guitar from a parlor instrument to a concert hall presence. That shift made possible the entire tradition of classical guitar as a serious solo art form — the compositions of Francisco Tárrega, Andrés Segovia’s 20th-century concert career, and the global spread of guitar-based music in virtually every genre.

The guitar is now likely the most widely played instrument on Earth. That reach — across flamenco, bossa nova, blues, rock, and classical concert music — traces back, in no small part, to decisions made by one craftsman in southern Spain in the middle of the 19th century C.E.

Blindspots and limits

Torres worked within a European craft tradition that, while shaped by centuries of Moorish and broader Mediterranean influence, has often been narrated as a purely Spanish or Western story. The contributions of Islamic luthiers and instrument makers who carried the oud tradition into Iberia remain less thoroughly documented in mainstream guitar history. Additionally, Torres’ own historical record is incomplete — exact dates, the full range of his instruments, and details of his working methods survive only partially, meaning some aspects of what he actually built and when remain subjects of scholarly debate.

Read more

For more on this story, see: ThoughtCo — History of the acoustic and electric guitar

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