Deep inside the El Castillo cave in northern Spain, a cluster of five red, bell-shaped markings dating back 17,000 to 15,000 years may represent the oldest known depiction of a mind-altering plant in human history, according to research surveying global shamanic ritual plants. Located up a side passage away from the main pathway of the cave, the panel features a natural stone ledge running beneath the marks like the lip of an altar. For more than a century, archaeologists have simply catalogued these symbols as unidentified ice age markings.
Examining the El Castillo Cave Plant Interpretation
According to researchers studying global shamanic traditions, the painted signs share a distinct visual silhouette with psychoactive nightshades native to the region, such as belladonna and local henbane. The markings display a drooping, five-lobed bell shape with a mouth flaring outward, accompanied by a central line that mirrors the veins of a living flower. While skeptics argue that simple bell shapes can recur by chance, researchers point to the deliberate grouping of the signs, the altar-like ledge beneath them, and independent evidence that prehistoric Europeans had intimate knowledge of these plants. Other historical interpretations, such as a mid-20th-century framework by French archaeologist André Leroi-Gourhan, categorized such rounded and triangular Palaeolithic forms as vulvar or female symbols. However, specialists like Canadian paleoanthropologist Genevieve von Petzinger have challenged that perspective, noting it often reflects the assumptions of early male researchers.
Historical Use of Psychoactive Plants in Europe
The nightshade family contains potent active compounds including atropine, scopolamine, and hyoscyamine, which are known to trigger vivid hallucinations and physical sensations such as the feeling of sprouting fur or feathers. These effects parallel part-human, part-animal figures found throughout ice age art, such as the 40,000-year-old ivory carving known as the lion-man of Hohlenstein-Stadel and various “sorcerers” depicted in French caves with antlers or claws. Evidence of consumption persists later in the archaeological record; chemical analysis of Bronze Age human hair recovered from the Es Càrritx burial cave in Menorca confirmed that humans consumed atropine and scopolamine approximately 3,000 years ago. Plant usage continued into later centuries, appearing in records of European witch trials between the 15th and 17th centuries as a core component of flying ointments.
Testing the Palaeolithic Plant Hypothesis
While the El Castillo panel belongs to the lower Magdalenian period of the upper Palaeolithic, other candidate depictions of mind-altering plants, such as the mushroom figures of Tassili n’Ajjer in the Sahara, date back roughly 7,000 to 9,000 years. A 2023 survey of 5,786 catalogued images across 113 European Palaeolithic caves found that plant representations account for just 0.07% of the total, suggesting early artists may have rarely painted flora or that botanic illustrations have long been misidentified as abstract signs. Modern sediment analysis techniques capable of recovering ancient environmental DNA could soon test the hypothesis if traces of the Solanaceae family—which includes both belladonna and henbane—are detected near the shrine-like stone concretion directly beneath the painted panel.
Did You Know?
At Pinwheel Cave in California, chewed bits of hallucinogenic plant matter wedged into the rock provided the world’s first unambiguous physical proof that a plant depicted in rock art had been ingested at the site.
Frequently Asked Questions
What are the El Castillo bell-shaped signs?
Located in a northern Spanish cave and created between 17,000 and 15,000 years ago, these five red markings have traditionally been categorized as unidentified ice age symbols, though recent research argues they depict psychoactive nightshade flowers.
How old is the El Castillo cave art panel?
The panel dates to the lower Magdalenian period of the upper Palaeolithic, placing it roughly 17,000 to 15,000 years old.
What plants might the cave paintings represent?
Researchers suggest the shapes resemble the drooping, flared bells of psychoactive nightshades native to Europe, specifically belladonna or local henbane.
How can this archaeological interpretation be tested?
Modern techniques for recovering ancient environmental DNA from cave sediment could potentially detect traces of the Solanaceae plant family near the panel.
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