Colonial Structure Found Under Mérida Cultural Center

Members of a local caving group spent a recent morning underground in the heart of Mérida, documenting a centuries-old chamber that most visitors to the Centro Cultural del Mayab probably don’t know exists beneath their feet.

The Grupo Espeleológico Ajau led the exploration on Aug. 15, mapping and photographing a subterranean structure believed to date to the 16th century, during the earliest years of Spanish colonial construction in the city. Seven members took part in the reconnaissance visit, which began at 9 a.m.

What they found was a vaulted space with barrel-arched galleries and rounded arches, built of limestone masonry and coated with mortar, some of it still bearing traces of the original plaster finish.

Along the walls, the group counted at least nine rectangular openings cut directly into the stone, spaced at fairly regular intervals and set at different heights. Their original purpose remains unclear. The cavers noted the openings looked deliberate and evenly placed, but nothing so far explains what they were built to hold or do.

One detail stood out to the group: fragments of charcoal mixed into the original construction material. According to Grupo Espeleológico Ajau, that technique has Maya origins and was later adopted by Spanish builders, likely as a way to manage moisture inside colonial structures — a practical borrowing from local know-how that ended up embedded, literally, in the city’s Spanish-era walls.

Exactly what the chamber was used for is still an open question. Some features point to a possible crypt. But signs of past moisture damage have also raised the possibility that the space functioned as a water cistern, or aljibe, a common feature in colonial-era buildings that needed a reliable water supply.

It’s a modest mystery by the standards of a city that sits atop centuries of layered history. Mérida’s downtown has repeatedly turned up architectural surprises during construction projects and restoration work, from cobblestone fragments found under the Plaza Grande to entire Maya structures uncovered in the city’s outskirts — each one adding another piece to the record of how the city was built, and on top of what.

The caving group photographed the space and took field notes for further study, and credited historian Felipe Castro Medina with arranging access to the site. Ajau said continued analysis of the chamber could offer insight into construction techniques and how buildings were used during Mérida’s early colonial period — one more entry in the city’s long list of colonial-era finds hiding in plain sight.

No date has been announced for further excavation or public access to the site.

With reporting from Por Esto!