The Ħal Saflieni Hypogeum is a prehistoric underground burial complex in Paola, Malta, cut by hand into soft globigerina limestone on three levels, the deepest 10.6 metres below the modern street. UNESCO dates its use to about 4000–2500 BCE and records that it once held the remains of roughly 7,000 people. It belongs to the same culture that raised Malta's megalithic temples, including Ġgantija on Gozo, which rank among the earliest free-standing stone buildings in the world.
Great age, careful engineering, a chamber that seems to sing back when spoken into and a set of skulls wrapped in internet lore make Malta one of the most discussed sites in alternative history. It is also one of the best documented. This article sets out what the excavations, the radiocarbon dates and the acoustic studies actually show, and where the popular stories go further than the evidence.
What are the megalithic temples of Malta?
The Megalithic Temples of Malta are a group of Neolithic stone monuments on Malta and Gozo built during the 4th and 3rd millennia BCE. UNESCO inscribed Ġgantija as a World Heritage Site in 1980 and in 1992 extended the listing to cover five more: Ħaġar Qim, Mnajdra, Ta' Ħaġrat, Skorba and Tarxien. In UNESCO's own wording, they "rank amongst the earliest free-standing stone buildings in the world."
The temples share a recognisable plan: a concave forecourt and monumental doorway leading to a central passage with pairs of rounded, lobed chambers on either side. Builders used two local stones, the hard coralline limestone for outer walls and the softer globigerina limestone for finely dressed interiors, doorways and carved slabs. Inside, excavators found altars, animal bones from sacrifice or feasting, and heavy-bodied "fat lady" figurines whose meaning is still debated.
People did not walk to Malta. The islands were first farmed by communities who crossed the sea from Sicily in the sixth millennium BCE; recent environmental studies push that arrival back to around 5900–5800 BCE, while the earliest cultural material is somewhat later. The crossing, carrying seed grain and livestock in open boats, belongs to the longer story of early human seafaring. The temple-building culture emerged on the islands more than two thousand years after that first settlement.
How old is Ġgantija, and is it older than Stonehenge and the pyramids?
Ġgantija was built in the Ġgantija phase, which on the recalibrated radiocarbon chronology runs from about 3600 to 3000 BCE; Heritage Malta gives a broad span of 3800–2000 BCE for the life of the complex. It consists of two temples side by side on Gozo, with separate entrances, enclosed within a single outer megalithic wall. The southern temple is the larger and older of the pair.
That makes Ġgantija older than the earliest phase of Stonehenge, which began around 3000 BCE, and centuries older than the Great Pyramid of Giza, completed around 2560 BCE. For more on how the British monument developed, see the companion piece on who built Stonehenge and how.
It does not make the Maltese temples the oldest monuments on Earth. Göbekli Tepe in south-east Turkey, with its carved T-shaped pillars, dates to around 9600 BCE, some six thousand years before Ġgantija. What Malta can claim is a very early tradition of free-standing stone architecture built by a small island farming society.
The name Ġgantija means "place of giants" in Maltese. It comes from Gozitan folklore, in which a giantess named Sansuna raised the walls while carrying her child on her shoulder. The legend explains why later islanders thought only giants could move such stones; it is not evidence about who built them. Archaeology points to Neolithic farmers moving the blocks with levers and rollers.
What happens at Mnajdra at the equinox and solstice?
Mnajdra's South temple is oriented so that at the spring and autumn equinoxes the rising sun shines straight through its main doorway into the inner chambers. At the winter and summer solstices, according to Heritage Malta, the beams of the rising sun pass along the sides of the main doorway and each time light the edge of a different decorated slab in the first chamber.
The alignment shows that the builders tracked the sun's annual cycle and wanted it to enter the building at chosen moments. It suggests a calendar tied to farming and ritual.
What was found at Tarxien?
Tarxien is a complex of four megalithic structures discovered in 1913 by a farmer, Lorenzo Despott, and excavated between 1915 and 1919 by Sir Themistocles Zammit, then Director of Museums. Its South structure contains some of the finest prehistoric relief carving in the Mediterranean: running spirals and processions of animals, including goats, bulls, pigs and a ram.
The same structure holds the lower half of a colossal statue of a figure in a pleated skirt, one of the largest prehistoric statues known from the Mediterranean. After about 2000 BCE, newcomers of the Early Bronze Age reused parts of Tarxien as a cremation cemetery, placing urns of burnt remains among the older ruins. By then the temple culture had already ended, around 2500 BCE, for reasons archaeologists still debate.
What is the Ħal Saflieni Hypogeum?
The Hypogeum is the underground counterpart of the temples: a sequence of chambers, passages and halls cut downward into the rock over many centuries. Its upper level is the oldest; the middle level contains the most carefully worked rooms, with walls carved to imitate the trilithon doorways and corbelled ceilings of above-ground temples; the lowest level reaches 10.6 metres below the present ground surface.
UNESCO describes the site as conceived as an underground cemetery, perhaps first used as a sanctuary, in use from about 4000 to 2500 BCE. Its excavators found the jumbled bones of thousands of people, estimated at around 7,000 individuals, together with pottery, beads, amulets and figurines. The best known find is the "Sleeping Lady," a small clay figure of a woman lying on her side on a low couch, now displayed at the National Museum of Archaeology in Valletta.
The Hypogeum was found by accident in 1902, when workers cutting into the rock for a new housing development broke through its roof, and parts of the upper level were damaged before archaeologists took over. Fr Manuel Magri led the first excavations from 1903; he died in 1907 and his field notes were lost. Zammit continued the work until 1911 and published the results.
Several chambers carry paintings in red ochre: spirals, spots and a honeycomb pattern on ceilings and walls. They are the only prehistoric wall paintings known in Malta. Because breath, humidity and temperature changes had already harmed the paintings, Heritage Malta now admits only 10 people at a time.
Why is the Oracle Room famous?
The Oracle Room is a decorated chamber on the middle level with a small, oval niche cut into one wall. When a person, especially one with a low voice, speaks or chants into the niche, the sound resonates and carries through the surrounding chambers. It is the root of most claims about the Hypogeum as a "sound temple."
Several studies have measured the effect. Paolo Debertolis, Fernando Coimbra and Linda Eneix, writing in the Journal of Anthropology and Archaeology in 2015, reported a double resonance at about 70 Hz and 114 Hz in the Oracle Room that a low male voice can excite through the complex. A more systematic survey by Rupert Till, published in Antiquity in 2017, criticised earlier work for a lack of rigour and found that its own results "confirm some, but not all, prior observations."
The widely quoted "110 Hz" number comes from studies elsewhere. Robert Jahn, Paul Devereux and M. Ibison, in the Journal of the Acoustical Society of America in 1996, measured strong resonances of roughly 95–120 Hz in several chambered monuments in Britain and Ireland, within the range of an adult male voice. In 2008, Ian Cook, S. K. Pajot and Andrew Leuchter reported in Time and Mind that a 110 Hz tone produced reduced left-temporal EEG activity in 30 healthy volunteers, and they described the work as a pilot study.
These are small, interesting studies. They do not show that the builders designed the room to a specific frequency, or that the resonance alters consciousness. Stone chambers of a given size resonate at frequencies set by their dimensions, and a room carved for ritual speech would naturally favour voices. Readers who want the wider frequency debate can compare the 432 Hz versus 440 Hz evidence, and the related claims about infrasound in Egyptian monuments.
What about the elongated skulls of Ħal Saflieni?
The skull story is lore built on a misread word. In 1926 Zammit described the Hypogeum skulls as "of the long variety (dolichocephalic)." Dolichocephalic is a standard anthropological term for a naturally long, narrow head shape, common in many populations. It does not mean the skulls were artificially elongated.
Several things later fed claims of "missing" or hidden skulls. Some skulls were once displayed at the National Museum of Archaeology and are no longer on public view. Writers in the Italian magazine Hera claimed to have seen elongated skulls lacking a sagittal suture, the seam along the top of the head. None of this has been supported by published osteological study, and nothing in the excavation record describes non-human remains.
The real puzzle is how little survives. Heritage Malta reports that skulls from fewer than 20 individuals remain out of an estimated 7,000 people. In July 2019 it announced a funded study, "The Sentinels of Ħal Saflieni, Malta: Science Facts versus Science Fiction," led by Associate Professor Ronika Power of Macquarie University with Heritage Malta and the Superintendence of Cultural Heritage, to examine their health, disease, diet, lifestyle and ancestry and to set the record straight on their condition and origins. For how genuine cranial shaping works and how it is identified in bone, see the companion article on the Paracas elongated skulls.
Billy Carson's reading
Billy Carson has not published a dedicated video, episode or book chapter on Malta, the Hypogeum or its skulls, so this article does not attribute any position on these sites to him. The questions the site raises do run through his wider work: how early societies built monumental architecture, the role of sound and frequency in ritual, and the claims made about elongated skulls around the world.
On those threads, his audience can start with the Anunnaki topic hub, where his reading of ancient origins is set out in his own framing, and the companion pieces on Paracas skulls and 432 Hz linked above, which separate the claims from the measurements. Malta is a useful test case for that approach: a site with real astronomical alignments and real acoustic effects, where the evidence is strong enough to stand without embellishment.
Watch, read and go deeper
The Ancient Enigmas series on 4BK TV explores the monuments and open questions that sit on the edge of mainstream history. For the wider sweep of early sacred building, the guides to Göbekli Tepe and Stonehenge linked above put Malta's temples in context, and the Paracas article covers the skull question in depth. The Anunnaki topic hub gathers Billy Carson's articles and episodes on ancient civilisations in one place.
Frequently asked questions
How old is the Ħal Saflieni Hypogeum?
UNESCO dates the use of the Hypogeum to about 4000–2500 BCE, and Heritage Malta gives a range extending to around 1500 BCE. It was cut downward over many centuries, so the upper level is older than the lower ones. That makes it one of the oldest known underground burial complexes in the world.
Can you visit the Hypogeum?
Yes, but numbers are tightly controlled. Heritage Malta allows only 10 people inside at a time to protect the painted chambers and the microclimate, so tickets often need to be booked weeks in advance.
Were elongated or non-human skulls found in Malta?
No published study supports that. Zammit's 1926 description of the skulls as "dolichocephalic" means naturally long-headed, not artificially elongated. Skulls from fewer than 20 individuals survive, and Heritage Malta's 2019 "Sentinels of Ħal Saflieni" project was set up to study them scientifically.
Does the Oracle Room resonate at 110 Hz?
Measurements differ. Debertolis and colleagues reported a double resonance at about 70 Hz and 114 Hz in 2015, while the 110 Hz figure comes mainly from studies of British and Irish chambered tombs and a 2008 pilot EEG study. None of this shows the builders deliberately tuned the chamber or that the sound changes consciousness.
Who built the Malta temples?
They were built by Neolithic farming communities descended from people who had crossed from Sicily centuries earlier. The name Ġgantija, "place of giants," comes from a local legend about a giantess, not from archaeological evidence. The blocks were most likely moved with levers and rollers.
Sources and further reading
- UNESCO World Heritage Centre, "Megalithic Temples of Malta" (inscribed 1980, extended 1992) and "Ħal Saflieni Hypogeum" (inscribed 1980).
- Heritage Malta, site descriptions for Ġgantija, Ħaġar Qim and Mnajdra, Tarxien and the Ħal Saflieni Hypogeum, and the 2019 announcement of "The Sentinels of Ħal Saflieni" project.
- Themistocles Zammit, excavation reports on the Ħal Saflieni Hypogeum (from 1910) and Tarxien, and his later writings on Malta's prehistory.
- Paolo Debertolis, Fernando Coimbra and Linda Eneix, "Archaeoacoustic Analysis of the Ħal Saflieni Hypogeum in Malta," Journal of Anthropology and Archaeology 3(1), 2015.
- Rupert Till, "An archaeoacoustic study of the Ħal Saflieni Hypogeum on Malta," Antiquity 91, 2017.
- R. G. Jahn, P. Devereux and M. Ibison, "Acoustical resonances of assorted ancient structures," Journal of the Acoustical Society of America, 1996.
- I. A. Cook, S. K. Pajot and A. F. Leuchter, "Ancient Architectural Acoustic Resonance Patterns and Regional Brain Activity," Time and Mind 1(1), 2008.
- Anthony Bonanno, "Hiatus or Continuity in Prehistoric Malta? From Early Neolithic to Temple Period," EXPRESSION 28, 2020.
