In 2005, a claim about a wooded hill brought Visoko in Bosnia and Herzegovina into an international argument about the ancient past. Semir Osmanagić proposed that Visočica concealed an enormous artificial pyramid. Excavated stone surfaces, apparent regularity and comparisons with monuments elsewhere became part of the case for it. Geologists and archaeologists disputed that interpretation and warned about the treatment of the region’s documented heritage. The historical mystery lies in the competing readings of the same landscape, rather than an established discovery of a prehistoric pyramid.
This case follows the early controversy through original reports and statements from 2006–2007. The sources include the University of Tuzla geological team’s signed report, a qualified proponent report by Aly Barakat, Robert Schoch’s account of his field visit, archaeological objections and Visoko’s record of the medieval town on the summit. Their observations, recommendations and claims are kept distinct. A geological description of a rock is not interchangeable with a proposed date for a building, and a protected medieval site is not evidence for the pyramid beneath it.
The claim and its early presentation
A foundation-hosted account posted on 26 August 2007 traces the proposal to Osmanagić’s 2005 visit and describes excavation beginning in 2006. It presents Visočica as the Pyramid of the Sun and nearby Plješevica as the Pyramid of the Moon. It also promotes claims about geometry, orientation and stone layers. These are statements made in support of the project, rather than independent verification of the claimed structures.
The proposal involved more than a hill resembling a familiar shape from one direction. Its significance depended on the claim that people had deliberately constructed or substantially reshaped it. A convincing account therefore required evidence connecting the stone surfaces to building activity, with a reliable chronology. Names such as Pyramid of the Sun express the project’s interpretation; using those names in a source trail does not settle whether the features are pyramids.
The Tuzla team: boreholes, documents and field checks
The University of Tuzla report is dated 17 April 2006 and signed by Sejfudin Vrabac and seven colleagues. Its final note records adoption by the faculty’s scientific and teaching council on 5 May. The team reviewed earlier geological documentation and Osmanagić’s book, examined borehole cores and carried out fieldwork. The six boreholes listed range from three to seventeen metres deep; the report also discusses three trial pits.
A central disagreement concerned what earlier observations actually showed. The team compared several alleged anomalies in the book with descriptions by geologists Nadžija Nukić and Radmila Kovačević. For example, material called poor concrete in the book was identified as brecciated conglomerate in the geological records. The team’s conclusion describes layered clastic sediments deposited during the later Miocene, with sandstone, marl and clay below and conglomerates above. It explains the hill’s present form through subsequent geological processes. This was a documented examination of a particular claim, rather than a rejection based only on a distant photograph.
Barakat’s more qualified interpretation
A different position appears in Aly A. Barakat’s preliminary report, headed June 2006 and published on the foundation website on 3 November 2007. Barakat described Miocene sedimentary rocks, tectonic deformation and erosion. He nevertheless interpreted some conglomerate blocks and surface regularity as traces of human modification. His proposed model was a natural hill that people had shaped and supplemented with covering stones, rather than an entire mountain assembled from quarried blocks.
His description also qualifies the geometry: the northern face is the most regular, the east nearly regular, while other sides are less regular or merge with the surrounding formation. The conclusion calls the results inconclusive and requests further geological, geophysical and especially archaeological work. He also says a proposed connection between tunnels and pyramids was unclear. Reporting this as an unqualified demonstration of an ancient pyramid would remove the caution that is present in a source favourable to the idea.
Schoch’s visit and the natural explanation
Geologist Robert M. Schoch’s own account, adapted from an article published in September 2006, describes his July–August visit. He examined the exposed rocks and viewed the terrain from the air. Where the project identified artificial concrete and construction blocks, he saw sandstone and conglomerate broken by geological stresses and movement. He linked block size to the thickness of the original beds, with thicker layers producing larger pieces.
Schoch also reported sedimentary structures and fossil leaf material. His explanation treats apparent paving and terraces as features of natural strata, with some surfaces altered during the excavation itself. He described a tunnel as already modified in recent times and did not establish an ancient connection between it and a pyramid. His stronger comments about allegedly recent inscriptions rely partly on information from an unnamed source; those comments should not be treated as a separately documented finding that a particular person fabricated an inscription.
Why archaeologists objected
The open letter to UNESCO’s director-general dated 12 June 2006 shows why professional objections extended beyond rock identification. Its signatories included Mark Rose, Dubravko Lovrenović and Anthony Harding. They warned that excavations threatened actual archaeological remains, including the royal town of Visoki on Visočica, and asked that any expert visit should include Bosnian specialists. They opposed presenting a possible UNESCO visit as support for the pyramid claim.
The letter is an intervention by critics, and its accusations about the project’s methods and motives remain their statements. Its distinction between a proposed monument and existing heritage is nevertheless crucial to understanding the dispute. An argument over the deeper origin of a hill did not suspend the need to document structures, preserve context and evaluate finds from known historical periods. Finding something genuinely old in an occupied landscape would not automatically validate every larger claim made about that landscape.
A further declaration dated 11 December 2006, signed by seven European archaeological leaders, rejected the project and criticised the diversion of scarce resources from heritage protection. The signatories included Hermann Parzinger, Jean-Paul Demoule, Anthony Harding and Mike Heyworth. This statement records a clear professional position and its conservation concerns. It is not itself a geological survey, and should be read alongside the field reports rather than substituted for them.
The documented town on the summit
Visoko’s municipal heritage account identifies the medieval royal town of Visoki on the summit and records its designation as a national monument on 2 March 2004, before the pyramid controversy. The page gives a history of investigation: Đorđe Stratimirović’s surface work in 1890–1891, later descriptions, Đoko Mazalić’s published study in 1954 and trial excavation in 1976. The hill already had an archaeological history when the new proposal appeared.
The same municipal record describes systematic excavations in 2007 and 2008 by the National Museum of Bosnia and Herzegovina and Visoko’s local museum, led by medieval specialist Lidija Fekeža. They revealed previously unknown walls and archaeological finds belonging to the royal town. That work supplies a concrete historical context for the concern about the hill. It also distinguishes evidence for a medieval settlement from the much broader and unsupported inference that the entire landform is an artificial prehistoric monument.
The early sources do not establish the claimed enormous prehistoric pyramid. They preserve an instructive disagreement about geology, the interpretation of preliminary observations and the protection of archaeological context. The public map point is the verified camera location for the modern photograph near Luke stadium, providing a broad view towards Visočica; it does not locate an excavated chamber or a reconstructed pyramid apex. Related reading: Other Mysteries, Lake Cerknica’s changing explanations and the Historical Cases directory. Sources and image rights checked 5 November 2026.