Red disks painted 40,800 years ago - so old they might predate Homo sapiens in Europe. If Neanderthals created this art, it would prove they had symbolic thinking and weren't the brutes of popular imagination. The dating is controversial but tantalizing.
Gabinete de Prensa del Gobierno de Cantabria, CC BY 3.0 es, via Wikimedia Commons
A 40,800-year-old question
Inside the El Castillo cave, in the "Panel of Hands," a simple red disk of paint poses a complex question. A 2012 study dated this unassuming circle to be at least 40,800 years old, making it the oldest known cave art in Europe. The age is not derived from the pigment itself, which is inorganic ochre, but from the thin layer of calcite that formed over it. Researchers used Uranium-thorium (U-Th) dating to analyze the radioactive decay of uranium into thorium within the calcite. This technique provides a minimum age for the artwork underneath the deposit.
This date places the art at a fascinating intersection of prehistory. Anatomically modern humans, Homo sapiens, are thought to have arrived in this part of Europe around 41,500 years ago. The minimum age of 40,800 years means the painting was created during this narrow window of overlap, or, more provocatively, just before modern humans arrived. If the art is even a few hundred years older than its calcite covering, it could only have been made by the region's previous inhabitants: the Neanderthals (Homo neanderthalensis).
The mind of a Neanderthal
For decades, Neanderthals were depicted as unintelligent brutes without abstract or symbolic thought. The creation of art is a form of symbolic behavior. Attributing the El Castillo dots to Neanderthals would change our understanding of their cognitive abilities. Evidence suggests that Neanderthals were more sophisticated than once believed; they buried their dead, used complex tools, and wore personal ornaments. Cave art would be an addition to this list.
The art in El Castillo shows a long history of use, spanning over 20,000 years. The simple dots and hand stencils—one of which dates to at least 37,300 years ago—are the oldest forms. Later artists added figures of animals like bison and deer. The technique for creating the dots and hand stencils involved blowing pigment through a tube or directly from the mouth onto the cave wall. While the debate over authorship continues, with some scientists maintaining that early Homo sapiens are the more likely artists, the possibility of Neanderthal creativity remains. Further dating of art from this period is needed to settle the question.
💡Fun Facts
The red pigment used for the dots is ochre, a natural clay earth pigment containing ferric oxide.
El Castillo is one of four caves on Monte Castillo that are part of the larger UNESCO World Heritage site, the "Cave of Altamira and Paleolithic Cave Art of Northern Spain".
The cave contains more than 275 distinct figures, representing animals, human hands, and abstract symbols.
Studies of hand stencils in the cave suggest that many were made by women.
Opening times vary seasonally. It is essential to check the official website and book tickets online in advance, as visitor numbers are strictly limited.
Admission
General admission is €15.00 (as of early 2026), but check the website for current pricing and concessions.
Accessibility
The terrain inside the cave is uneven and can be slippery, with steps. It is not suitable for individuals with mobility issues. The average temperature is 11-12°C, so warm clothing is recommended.
