2,700-year-old Olmec “portal to the underworld” resurfaces after a century-long disappearance

For more than 100 years, no one knew exactly where it was, only that it was gone. Somewhere along the way, a massive stone carving created nearly 2,700 years ago by the Olmecs quietly slipped out of Mexico, fractured, sold, stored, and passed along. This year, it finally made its way home.



The object is a six-foot-by-five-foot Olmec Cave Mask, also known as a Portal al Inframundo, or “passage to the underworld.” The stone carving depicts the Olmec jaguar god Tepeyollotlicuhti, recognizable by its flaring eyes and gaping mouth. It once stood in Chalcatzingo, in the Mexican state of Morelos, a site known for its early Olmec iconography and monumental reliefs.



Sometime in the early 20th century, officials are unsure of the exact date, looters removed the sculpture from the site. From there, it disappeared into a long circuit of museums and private collections in the United States. By 2023, the ancient artifact had resurfaced in Denver. That same year, authorities from the Antiquities Trafficking Unit in New York City secured it, setting the stage for its return to Mexico just months later.



“This incredible, ancient piece is a rare window into the past of Olmec society,” New York District Attorney Alvin Bragg said in a press statement. “Like many other looted antiquities, the Olmec Cave Mask was broken into several different pieces to make the smuggling process simpler.”



According to Mexico’s National Institute of Anthropology and History (INAH), which operates under the Ministry of Culture and is overseeing the restoration, the damage was extensive. The sculpture had been broken into 25 pieces. Rather than moving it again, experts began restoration work in situ to “provide greater stability and coherent visual reading,” INAH said in a press release.



“Some elements that make it up are original, but others, such as a metal structure based on bolts, cement reinforcements and replacements of missing parts and shapes, were added to give it stability again, even though the techniques and materials were not the most appropriate,” INAH’s Castro Barrera said in a statement translated into English. Some of those later structural additions are expected to remain in place.



The statue’s return was the result of years of persistence by researchers on both sides of the border. Archaeologist David Grove was the first to connect the recovered Cave Mask to the one long missing from Chalcatzingo. INAH investigator Mario Córdova Tello later confirmed that the artifact had been stolen and traced its location to Colorado, where it was held by a private collector as early as 2008.



Grove, who played a key role in identifying the object, did not live to see the end of the journey. He died one day before the sculpture arrived back in Mexico.



The Tepeyollotlicuhti portal is far from an isolated case. Countless artifacts taken from Indigenous sites remain scattered across museums and private collections worldwide, sometimes without clear records of how they were acquired. As calls grow louder for institutions to confront that history, the return of this Olmec masterpiece stands as a rare — and hard-won — example of what restitution can look like when decades of silence finally give way to action.