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Mining town preserves constructions built with overlaid quartzite, blending historical heritage, mystical tourism, and traditional mining in one of the most well-known landscapes of the Serra da Mantiqueira, where stone streets, centuries-old churches, and legends about spiritual energy have transformed the municipality into a cultural and tourist reference in the interior of Brazil.
In the south of Minas Gerais, São Tomé das Letras has consolidated its national fame by combining historical heritage in quartzite, mountainous landscapes, and a tradition surrounded by mystical accounts, a combination that has transformed the municipality into one of the most well-known tourist destinations in the Brazilian interior.
Built on quartzite formations popularly associated with Pedra São Tomé, the city preserves streets, houses, and churches built with overlaid shards, a characteristic that helped form a unique urban landscape immediately recognized by visitors and researchers.
Quartzite architecture shapes the identity of São Tomé das Letras
Since the first settlement nuclei, the abundance of quartzite directly influenced the way of building in the municipality, as residents began to use the rock itself extracted from the mountain to erect walls, pave streets, and structure religious buildings.
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Unlike the conventional model based on bricks and cement, local constructions took advantage of the natural characteristics of the material found in the region, creating an architectural pattern that has crossed generations without losing its original identity.
The State Institute of Historical and Artistic Heritage of Minas Gerais records that the Main Church, the Church of Our Lady of the Rosary, and buildings in the historic center were built with dry stones, laid by the overlapping of irregular shards, without the use of binders.
Directly linked to the geological conditions of the mountain, this architectural solution ended up creating a homogeneous visual identity, noticeable in facades, walls, and pavements that still preserve the rustic appearance associated with the old mining settlement.
In different parts of the city, the sensation is that the constructions emerge from the mountain itself, as the stone dominates practically all urban elements present in the historic center.
Historic center preserves churches and stone streets in Minas Gerais
Heritage recognition sought to preserve this ensemble in the face of urban transformations.
According to IEPHA-MG, there was a state listing related to the Chapel of Our Lady of the Rosary in 1985, with a subsequent rectification in 1996 to include the Historic Center and the Main Church.
The origin of the urban center is linked to the tradition of finding an image of Saint Thomas in a cave, an episode that supposedly motivated the construction of a chapel starting in 1770.
The current Main Church began to be built in 1785, becoming a landmark of local formation.
The state protection recognizes not only the churches but also the layout, the stone streets, and the relationship between architecture and topography.
This ensemble helps explain why São Tomé das Letras gained prominence among heritage scholars, visitors, and those interested in traditional constructions.
Dry Stone Technique Challenges Engineering for Centuries
Known as dry stone, the technique used in historical constructions relies mainly on the fitting, weight, and stability of the pieces, requiring practical knowledge accumulated by generations of workers involved in the extraction and processing of quartzite.
Without resorting to the use of cement or mortar, the resistance of the walls comes from the careful choice of the most suitable faces and the balanced distribution of loads throughout the entire structure.
In São Tomé das Letras, the use of quartzite favored this practice because the rock splits into relatively flat slabs and flakes.
This characteristic allowed the construction of thick walls, walls, floors, and portals integrated into the mountainous environment.
Even though it may seem rudimentary at first glance, the method requires precision during assembly because stability depends directly on the skill of those who select each stone, adjust the empty spaces, and create bindings resistant to time and climate changes.
Thanks to this knowledge passed down over the years, several centuries-old constructions remain preserved in the mountains, despite constant exposure to wind, humidity, and temperature variations typical of the mountainous region.
Esoteric Tourism Boosts Visits to the Minas Gerais City
Far beyond the architectural heritage, São Tomé das Letras also gained national prominence for its atmosphere surrounded by symbolism, an element that helped transform the municipality into a reference for visitors interested in spirituality, nature, and alternative experiences.
Caves, rock inscriptions, waterfalls, viewpoints, and reports of supposed underground portals fuel popular narratives that have circulated for decades among residents, tourists, and groups connected to mysticism and ufology.
Agência Minas reported in 2025 that the municipality underwent a tourism repositioning strategy focused on spirituality, connection with nature, and experiential itineraries.
The proposal reinforced elements already associated with the local image, such as mineral formations, rock art, and sunsets.
Among the most sought-after spots are the Pyramid House, São Tomé Cave, Carimbado Cave, Witch’s Stone, and several waterfalls in the surroundings.
Tourism combines contemplation, trails, popular culture, and commerce aimed at visitors of different profiles.
Pedra São Tomé supports mining and regional economy
The same stone that shaped the architecture also supports an important part of the regional economy.
In 2024, Pedra São Tomé received the first Geographical Indication certificate in the Designation of Origin category granted to an ornamental stone in Minas Gerais.
According to the state government, the certified area involves São Tomé das Letras, Luminárias, and Três Corações, with participation from the Association of Pedra São Thomé Miners, Fapemig, Sebrae Minas, and researchers from the Federal University of Alfenas.
The certification recognizes the technical and geographical characteristics of the local quartzite, mainly used in floors, facades, pool edges, and external cladding.
The stone is valued for properties such as a non-slip surface, light colors, and less heating under the sun.
Environmental preservation challenges mining expansion
Reconciling tourism, historical preservation, and mineral activity remains one of the main challenges faced by the municipality, as stone extraction drives the local economy and maintains jobs directly or indirectly linked to the sector.
At the same time, the activity alters areas of the mountainous landscape and requires constant environmental monitoring, especially regarding licensing, rock transportation, and the recovery of regions impacted by quarries.
The Geographical Indication itself has come to associate the origin of the stone with criteria of provenance and regularity.
This type of recognition can strengthen the production chain but does not eliminate the need for public policies to protect the terrain, watercourses, and natural attractions.
São Tomé das Letras remains marked by this coexistence between rock, faith, tourism, and work.
On the quartzite streets, the city preserves a history where geology ceased to be just a backdrop and began to define the economy, architecture, and collective memory.
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