Within Bulgaria
What Do Bulgaria's Official UFO Records Reveal?
Bulgaria has substantial military archives, yet no transparent UFO catalogue is publicly evident and key operational files remain inaccessible.
On this page
- Military and state archives available to researchers
- Why a national UFO catalogue is hard to establish
- What missing records can and cannot prove
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Introduction
Publicly available evidence does not show that Bulgaria has ever maintained a transparent, comprehensive national catalogue of unidentified flying object (UFO) or unidentified aerial phenomenon (UAP) reports comparable to the declassified collections released by some Western governments. Instead, researchers attempting to reconstruct Bulgaria’s UFO history encounter an uneven documentary landscape: extensive state and military archival institutions exist, but no publicly searchable archive dedicated to UFO investigations has been identified. As a result, the country’s UFO record is reconstructed largely from newspaper reporting, witness testimony, private databases and retrospective accounts rather than complete official case files.[AIP-BG]aip-bg.orgAnnual Reports on the State of Access to Information | Access to Information ProgrammeJune 26, 2026…
This distinction is important. A lack of accessible official files is not evidence that extraordinary events occurred, nor is it evidence that authorities systematically investigated them. It simply means that historians cannot establish a complete evidential record. Bulgaria therefore illustrates a broader archival problem: missing or inaccessible records limit what can be concluded, whether one is seeking to confirm remarkable claims or to explain them through ordinary causes.
What official archives are available to researchers?
Bulgaria possesses well-established archival institutions covering government, military and communist-era records. The country’s State Archives preserve large collections relating to state administration, while military historical collections document the armed forces and defence institutions. These repositories demonstrate that substantial official records exist in general, but they do not provide a publicly identifiable catalogue devoted to UFO investigations or unexplained aerial sightings.[AIP-BG]aip-bg.orgAnnual Reports on the State of Access to Information | Access to Information ProgrammeJune 26, 2026…
For researchers, this creates an immediate methodological challenge. Military archives are organised around operational, administrative and historical functions rather than around public-interest subjects such as UFOs. Unless records were explicitly indexed using relevant terminology—or have been declassified and catalogued under recognisable headings—they are difficult to identify through ordinary archival searches.
The result is that:
- no publicly documented Bulgarian equivalent of the United Kingdom’s released Ministry of Defence UFO files has been identified;
- no officially maintained public database of Bulgarian UFO reports is available;
- there is no known declassified national investigation programme comparable to the United States Air Force’s historical Project Blue Book.
These absences do not prove that no reports ever reached military or security authorities. They indicate only that no transparent archive allowing independent historical review has become publicly available.
Why a national UFO catalogue is difficult to establish
Unlike countries that periodically released government UFO files, Bulgaria offers no continuous official reporting system from which historians can reconstruct national trends.
Several factors contribute to this problem.
First, much of Bulgaria’s Cold War military documentation remains organised around defence, intelligence and operational history rather than unexplained aerial observations. Even where records survive, many remain difficult to identify without detailed archival knowledge.
Second, Bulgaria underwent major political transformation after 1989. Institutional restructuring, changing record-management practices and differing declassification priorities complicate efforts to trace continuity between communist-era reporting systems and modern state archives.
Third, there is no evidence that Bulgarian authorities routinely published annual summaries of unexplained aerial reports. Without official releases, researchers must combine material from:
- newspaper archives;
- television reporting;
- witness interviews;
- private UFO organisations;
- international reporting databases;
- later memoirs and recollections.
Each source type introduces different reliability issues, making it impossible to construct a fully verified national chronology from official documentation alone.
What the surviving official evidence actually shows
Where official involvement can be confirmed, it usually demonstrates that state institutions became involved in unusual events—not that they validated extraterrestrial explanations.
The best-known example remains the Tsarichina excavation of 1990–1992. The military unquestionably conducted the excavation, making it an authenticated historical operation. However, the extraordinary claims that later surrounded the project—including alleged extraterrestrial beings, ancient civilisations or hidden technologies—derive largely from later testimony, media reporting and paranormal narratives rather than publicly released military documentation demonstrating such discoveries.
This distinction is crucial. The existence of an official military operation is historically verifiable. The extraordinary interpretations attached to it are not supported by equivalent documentary evidence.
Outside Tsarichina, no comparable collection of authenticated official investigative files has entered the public domain for Bulgarian UFO cases.
Why journalism became the primary historical record
Because official documentation is sparse, journalism occupies an unusually important place in Bulgaria’s UFO history.
Newspapers and television reports often preserve:
- witness interviews;
- photographs;
- dates and locations;
- reactions from local authorities;
- subsequent attempts at explanation.
However, journalism cannot replace original investigative records. News reports rarely include radar logs, military communications, air traffic data, astronomical calculations or original photographic negatives.
Consequently, many Bulgarian cases remain impossible to reassess decades later. Researchers frequently know that an incident was reported but cannot reconstruct the evidence that investigators may—or may not—have examined at the time.
This documentary dependence also explains why the same incidents are often retold with increasing embellishment as they circulate through books, documentaries and internet discussions.
What missing records can—and cannot—prove
One of the most common misunderstandings in UFO research is treating absent records as evidence of concealment.
From a historical perspective, missing archives support only limited conclusions.
Missing records can indicate:
- incomplete preservation;
- restricted public access;[mfa.government.bg]mfa.government.bgSource details in endnotes.
- poor cataloguing;
- destruction through routine records management;
- administrative changes following political transition.
They cannot, by themselves, demonstrate:
- a government cover-up;
- confirmation of extraterrestrial craft;
- secret military recovery programmes;
- suppressed scientific discoveries.
Historians work from surviving evidence rather than speculation about what might once have existed. Where documentation cannot be examined, uncertainty remains exactly that: uncertainty.
How Bulgaria compares with countries that released UFO files
Bulgaria’s archival situation becomes clearer when contrasted with governments that have adopted explicit disclosure programmes.
The United Kingdom released decades of Ministry of Defence UFO files through The National Archives, allowing independent researchers to examine original correspondence, policy documents and sighting reports. Likewise, the United States has progressively declassified historical UFO material through the National Archives, including Project Blue Book records and, more recently, dedicated UAP collections established under modern legislation.[nationalarchives.gov.uk]nationalarchives.gov.ukThe National Archives UFOsThe National ArchivesUFOs - The National Archives…
No equivalent Bulgarian public release has been documented.
This comparison does not imply that Bulgaria possesses undisclosed collections of similar scale. Rather, it highlights a difference in archival transparency. In countries with released files, historians can directly evaluate official investigations. In Bulgaria, researchers generally cannot.
What evidence would strengthen the historical record?
The principal limitation in Bulgarian UFO research is not the number of reported sightings but the scarcity of independently verifiable official documentation.
Future understanding would improve significantly if researchers gained access to material such as:
- air defence incident logs;
- military radar records;
- civil aviation reports;
- air traffic communications;
- weather observations linked to reported events;
- original investigation files from defence or interior ministries;
- declassification indexes identifying whether unexplained aerial reports were ever catalogued.
Modern scientific studies of UAPs increasingly emphasise that reliable investigation requires multiple independent data sources—such as calibrated optical sensors, radar measurements, environmental monitoring and precise timing—rather than eyewitness testimony alone. Most publicly known Bulgarian cases lack this level of documentation, making definitive historical assessment difficult.[arXiv]arxiv.orgOpen source on arxiv.org.
The practical consequence of Bulgaria’s archive gaps
The absence of a transparent official UFO archive shapes nearly every discussion of Bulgarian sightings. Some incidents remain intriguing because the original evidence is unavailable; others have acquired legendary status precisely because documentation is incomplete.
For historians, the most defensible conclusion is a restrained one. Bulgaria possesses substantial government and military archival infrastructure, yet no publicly accessible national UFO catalogue has emerged from those collections. Consequently, the country’s UFO history rests far more heavily on journalism, witness reports and retrospective narratives than on declassified official investigations. That evidential gap limits both sceptical explanations and extraordinary interpretations, leaving many reported incidents historically unresolved rather than historically validated.
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Endnotes
1.
Source: aip-bg.org
Link:https://www.aip-bg.org/en/publications/annualreports/
Source snippet
Annual Reports on the State of Access to Information | Access to Information ProgrammeJune 26, 2026...
Published: June 26, 2026
2.
Source: arxiv.org
Link:https://arxiv.org/abs/2305.18566
3.
Source: archives.gov
Link:https://www.archives.gov/research/topics/uaps/rg-615
Source snippet
Record Group 615: Unidentified Anomalous Phenomena Records Collection | National ArchivesMay 22, 2026 — RECORD GROUP 615: UNIDENTIFIED AN...
Published: May 22, 2026
4.
Source: archives.gov
Link:https://www.archives.gov/press/press-releases/2025/nr25-07
5.
Source: arxiv.org
Title: arXiv The New Science of Unidentified Aerospace-Undersea Phenomena (UAP)
Link:https://arxiv.org/abs/2502.06794
6.
Source: gov.archives.bg
Link:https://gov.archives.bg/
Source snippet
archives.bgДържавна агенция "Архиви" - Държавна агенция "Архиви"July 3, 2026 — БЪРЗИ ВРЪЗКИ Image: links Новини Image: links Image: links...
Published: July 3, 2026
7.
Source: archives.gov
Link:https://www.archives.gov/research/topics/uaps/rg-collections
8.
Source: archives.gov
Link:https://www.archives.gov/research/topics/uaps%3E
9.
Source: archives.gov
Link:https://www.archives.gov/research/catalog/catalog-bulk-downloads/uap-bulk-download
10.
Source: archives.gov
Link:https://www.archives.gov/research/topics/uaps/faqs
11.
Source: archives.gov
Link:https://www.archives.gov/research/topics/uaps/textual-and-microfilm
12.
Source: archives.gov
Title: Project BLUE BOOK
Link:https://www.archives.gov/research/military/air-force/ufos
13.
Source: archives.gov
Link:https://www.archives.gov/records-mgmt/uap-guidance
14.
Source: archives.gov
Title: Do Records Show Proof of UFOs? | National Archives
Link:https://www.archives.gov/news/articles/do-records-show-proof-of-ufos
15.
Source: archives.government.bg
Title: bgДържавна агенция “Архиви”
Link:https://www.archives.government.bg/
16.
Source: sea.archives.government.bg
Link:https://sea.archives.government.bg/
17.
Source: mfa.government.bg
Link:https://www.mfa.government.bg/en/95
18.
Source: nationalarchives.gov.uk
Title: The National Archives UFOs
Link:https://www.nationalarchives.gov.uk/help-with-your-research/research-guides/ufos/
Source snippet
The National ArchivesUFOs - The National Archives...
19.
Source: nationalarchives.gov.uk
Title: UF O reports
Link:https://www.nationalarchives.gov.uk/explore-the-collection/explore-by-time-period/postwar/ufo-reports/
Additional References
20.
Source: youtube.com
Title: What Was the Government Covering Up at This Dig Site? | Tsarichina Hole
Link:https://www.youtube.com/watch?v=-yrx9s2_UZM
Source snippet
Inside Bulgaria's Skinwalker Ranch | The Tsarichina Hole...
21.
Source: uapobservatory.org
Title: UAP Observatory
Link:https://uapobservatory.org/
Source snippet
Analysis second. Public archive UAP Observatory * Home * Archive * Methodology * Support * Contact Public archive and research program SE...
22.
Source: youtube.com
Title: The Entity of Tsarichina REVEALED
Link:https://www.youtube.com/watch?v=AWf27g-lBGU
Source snippet
Operation Sunray | Hunting the Entity in the Tsarichina Hole...
23.
Source: youtube.com
Title: Inside Bulgaria’s Skinwalker Ranch | The Tsarichina Hole
Link:https://www.youtube.com/watch?v=7SEo8a4XxpA
Source snippet
Bulgaria's Tsarichina Hole is Pure NIGHTMARE Fuel...
24.
Source: youtube.com
Title: Bulgaria’s Tsarichina Hole is Pure NIGHTMARE Fuel
Link:https://www.youtube.com/watch?v=kJCuSGEhfwA
Source snippet
The Entity of Tsarichina REVEALED - Forgotten History...
25.
Source: uap-archives.com
Link:https://uap-archives.com/
26.
Source: archivesportaleurope.net
Title: Results (Institutions) | Archives Portal Europe
Link:https://www.archivesportaleurope.net/advanced-search/search-in-institutions/results-%28institutions%29/?repositoryCode=BG-00000021358
27.
Source: youtube.com
Title: Operation Sunray | Hunting the Entity in the Tsarichina Hole
Link:https://www.youtube.com/watch?v=t1eGM-dTZu0
28.
Source: freedominfo.org
Title: Freedom Info | Bulgaria
Link:https://www.freedominfo.org/regions/europe/bulgaria/bulgaria
29.
Source: searcharchives.bl.uk
Title: uk EA P894/1/11/12
Link:https://searcharchives.bl.uk/catalog/041-003404209