The Enigmatic History of Isla de Lobos: A Dive into Ancient Roman Craftsmanship

By Rafael Balbás

At the dawn of the 15th century, a curious spectacle unfolded at a tiny 6 square kilometer islet, drenched in golden dunes to the northeast of Fuerteventura. Colonies of sea lions looked on as the first foreign ships, led by the ambitious explorer Jean de Béthencourt, made landfall. The men aboard those Norman vessels, not caring much for the native environment, named it Isla de Lobos, believing themselves the first humans to tread upon its untouched shores. A tale echoing centuries earlier takes us back to the 1st century B.C. when King Juba II of Numidia and his crew encountered the same desolate landscape.

In this still-untamed African archipelago, the sailors found remnants of an ancient civilization—mysterious temples and abandoned villages inhabited by howling packs of dogs. These encounters ignited the imagination of the Romans, who dubbed the archipelago “Canarias.” According to the historian Pliny the Elder, those “Fortunate Islands” described by the poet Ovid lay just a five-day sail from Gades (modern-day Cádiz), a city bustling with Phoenician and Carthaginian merchants who thrived on one of antiquity’s most valued luxuries: purple dye.

A Surprising Discovery: Ceramics from Hispania

Fast forward to 2012, when a group of tourists stumbled upon a peculiar collection of pottery near one of Isla de Lobos’ pristine beaches. These artifacts, traced back to the ancient Hispania, unveiled a hidden treasure of clues—tens of thousands of shells that whispered secrets of the coveted purple dye, a material so prestigious that it was once reserved for divine beings and emperors. The remains we uncovered showed that Isla de Lobos holds the title of being the southernmost Roman site ever found.

The history of purple dye dates back to the Bronze Age, where numerous workshops scattered across the Mediterranean produced this illustrious color. Helena of Troy is noted in Homer’s “Iliad” for weaving garments in this royal hue. Legend has it that Hercules discovered the dye’s secret when he witnessed his dog chewing on a particular mollusk while being stained red. This color was derived from the glands of the Murex brandaris, which required an astonishing 100,000 mollusks to dye just one kilogram of wool.

Only the affluent—nobles, kings, and wealthy senators—could afford garments dyed in this regal color. By the 1st century A.D., it became synonymous with authority; Roman emperors were embraced in purple and were said to “take the purple” to signify their rule. Even after Constantinus the Great allowed Christianity to permeate Roman life in 313 A.D., the Church, which once denounced the ostentatious color, adopted it for its bishops and cardinals.

The Conch Shell Industry: Crafting Purple in the Empire

From roughly the 1st century B.C. to the 1st century A.D., vessels laden with supplies, food, materials, and laborers regularly landed at Isla de Lobos. They quickly set foot on the quest for the Stramonita haemastoma mollusks, whose glands assisted in producing the rich dye, employing mussels as bait in alignment with the tide.

Archaeologists have excavated just two of the estimated six shell middens on the islet. These sites unveil L-shaped structures whose function remains somewhat elusive—perhaps serving as storage or workshops. So far, over 184,507 mollusk remains have been identified, sufficient for dyeing approximately 26 kilograms of fabric.

Once harvested, these mollusks were crushed on rocks, and using tongs and metal tools, the valuable glands were extracted. These glands were subsequently left to marinate in saltwater pools for a week to reach their magnificent hue, a distinct symbol of power and divinity. Though this workshop was modest compared to others in the Roman Empire, it was geographically the most isolated.

“Material records from Lobos display an unusual diversity, which can only be explained by its distance from the home base—likely Gades,” explains María del Carmen del Arco Aguilar from the University of La Laguna. She is also the lead researcher for the study “Romans in the Canaries,” published in the National Archaeological Museum’s volume on contemporary archaeological research in Spain.

Among the material remains, numerous ceramic artifacts and amphorae intended for the transport of local oil, canned fish from Cádiz, wine, and preserved goods emerged, serving the workforce in this far-flung part of the Empire, who dined on commonplace kitchenware. Even remains from the refuse of these workshops revealed remnants of domesticated sheep and pigs, transported alive alongside the crew and allowed to roam freely on the islet.

“This site is intriguing, as hypotheses regarding its supply chain range from being part of the cargo at the point of departure, at any of the African stops, or upon arrival in the Canary Islands,” the researchers elaborated.

Whales, Sea Lions, and the Shadow of Slavery

But why invest so much effort in a seemingly small, remote, and not particularly productive purple dying workshop? Perhaps it was due to their involvement in whaling and sea lion hunting, as evinced by the remains of nets, hooks, harpoons, and bones discovered in refuse piles. Yet, curiously, no signs of salt-processing facilities or preserved food have been identified, suggesting fishing and hunting may have been undertaken primarily to enhance their diets.

Exploring further, another factor likely contributed to these costly summer expeditions: slave labor. Recent genetic research on ancient DNA from the Canaries, conducted by Vicente Cabrera’s team at the University of La Laguna and published in Scientific Reports, hints at this possibility.

It is plausible that the merchants from Cádiz managed to procure or purchase slaves along the contemporary Moroccan coast, where workshops dedicated to purple dye thrived under Juba II, the same Numidian king who had once chronicled the “Fortunate Islands.” Hence, by the turn of the 1st century A.D., the Romans departed, leaving behind a legacy soon to be absorbed by indigenous Berber cultures that would colonize the archipelago in the aftermath.

The remarkable story of Isla de Lobos, a humble island steeped in the grand tapestry of Roman history, continues to unveil its secrets. As archaeologists and historians delve deeper, they shed light not only on the craftsmanship of an ancient civilization but also on the lives and stories of those who inhabited this forgotten corner of the Empire.