Padua, Italy — April 1 2026 : A new metagenomic analysis of material collected from the Shroud of Turin has identified a wide range of genetic traces, including a substantial proportion linked to populations from the Indian subcontinent. The findings, led by geneticist Gianni Barcaccia of the University of Padua, provide additional insight into the environmental history and possible origins of the linen cloth, though they do not resolve longstanding questions regarding its age or authenticity.
Study Background and Methodology
The research, published as a preprint on bioRxiv on March 19, 2026, re-examines linen fibers originally collected during the official 1978 sampling campaign. Using DNA extraction and metagenomic sequencing techniques, the team analyzed microscopic material obtained from areas associated with the body image.
The Shroud of Turin is a linen cloth measuring approximately 4.4 meters by 1.1 meters. It bears faint frontal and dorsal images of a man showing signs consistent with crucifixion. The artifact has been preserved in the Cathedral of Saint John the Baptist in Turin, Italy, and has been documented in Europe since the mid-14th century, with some historical accounts suggesting earlier presence in the Near East. Radiocarbon dating (1988) indicated a medieval origin between 1260 and 1390 CE.
Human DNA Findings
The analysis identified multiple human mitochondrial DNA (mtDNA) lineages. Among them were:
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K1a1b1a, matching the mitogenome of a 1978 sample collector
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H2a2, corresponding to the revised Cambridge Reference Sequence
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H1b, commonly found in Western Eurasia
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H33, prevalent in the Near East and frequently observed among Druze populations
A quantitative assessment showed that over 55.6 percent of detected human DNA corresponded to Near Eastern lineages, while less than 5.6 percent aligned with Western European origins. Notably, approximately 38.7 percent of the human genomic data was linked to lineages associated with the Indian subcontinent, a finding the researchers described as unexpected.
Interpretation of Indian Genetic Signatures
The study proposes two primary explanations for the presence of Indian-associated DNA. One possibility is that the cloth came into contact with individuals of Indian ancestry over centuries through trade, pilgrimage, or handling. Another hypothesis suggests that the linen yarn itself may have originated in regions near the Indus Valley, historically known for textile production.
The researchers referenced historical linguistic and textual evidence, noting that the Greek term “Sindôn”, used for fine linen, may be connected to the Sindh region of South Asia. Rabbinic texts referencing “Hindoyin” in relation to linen imports were also cited, alongside broader documentation of trade links between India and the Mediterranean region.
Supporting Evidence from Earlier Research
The 2026 preprint builds on earlier findings published in 2015 in Scientific Reports, also led by Barcaccia. That study had already identified plant species and human mtDNA haplogroups such as M39, M56, R7, and R8, which are characteristic of populations from the Indian subcontinent. The new analysis integrates those earlier results with updated sequencing data, suggesting both prolonged exposure of the cloth across regions and the possibility of non-European material origins.
Microbial, Plant, and Animal DNA
Beyond human DNA, the study documented a complex biological profile on the cloth:
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Microbial DNA: Included bacteria commonly found on human skin, salt-tolerant archaeal communities, and fungi such as molds, consistent with long-term storage conditions.
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Plant DNA: At least 19 plant species native to the Mediterranean Basin were identified, along with species originating in Asia, the Middle East, and the Americas. Some of these were introduced to Europe after the 12th century.
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Animal DNA: Traces from domesticated species such as cattle, pigs, chickens, dogs, and cats were also detected.
Radiocarbon analysis of textile threads from the reliquary indicated repair interventions dated to 1534 CE and 1694 CE.
Scientific Context and Limitations
The researchers emphasized that the detected genetic material reflects cumulative environmental exposure and handling over centuries rather than a single origin source linked to the cloth’s creation or the individual depicted. The study also highlighted technical challenges in reconstructing complete mitochondrial haplotypes for certain South Asian lineages identified in previous analyses.
As a preprint, the research has not yet undergone peer review, and independent verification will be required to confirm the findings. Barcaccia declined requests for comment in some recent reports.
Ongoing Debate
The Shroud of Turin continues to be the subject of scientific, historical, and religious discussion. While the new genetic data provide additional detail about the cloth’s biological contamination and possible material pathways, they do not resolve debates regarding its age, origin, or authenticity as the burial cloth of Jesus Christ.
The study is publicly available on bioRxiv under a CC-BY-NC-ND 4.0 license. Researchers note that further multidisciplinary investigation will be necessary to better understand the artifact’s complex history.
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