Jetavanaramaya: The Ancient World's Tallest Brick Structure

Rising above the ruins of ancient Anuradhapura is a monument most visitors to Sri Lanka have never heard of, despite once being the third-tallest structure on the entire planet — surpassed only by the two Great Pyramids of Giza. Jetavanaramaya isn't just an impressive ruin; it remains, to this day, the largest brick structure ever built by human hands.

Built from Royal Guilt

The stupa's origin traces back to King Mahasena, who ruled Anuradhapura from 273 to 301 CE. Mahasena had controversially supported the destruction of the Mahavihara, Anuradhapura's most revered Theravada Buddhist monastery, in favor of the rival Mahayana-leaning Jetavana fraternity — a decision that deeply divided the Buddhist community of the time. Jetavanaramaya is believed to have been built partly as an act of atonement, initiated on the site where Arahat Mahinda, who first brought Buddhism to Sri Lanka, was cremated. Mahasena died before the stupa was finished, and it was completed around 301 CE by his son, Maghavanna I (also recorded as Kithsirimevan).

Taller Than Anything Outside Egypt

At its original height of 122 meters (400 feet), Jetavanaramaya was the tallest stupa ever built and the third-tallest structure anywhere in the world at the time — beaten only by the Great Pyramid of Giza and the Pyramid of Khafre. For roughly 700 years afterward, no stupa of comparable scale was ever attempted again, in Sri Lanka or anywhere in Southeast Asia. Builders elsewhere later adopted its distinctive bubble-shaped dome form, but never at anything close to the same size.

A Feat of Ancient Engineering

Constructing Jetavanaramaya required an estimated 93.3 million baked bricks and took around 15 years to complete, employing a skilled workforce of brickyard workers, bricklayers, and stonemasons. According to the ancient Mahavamsa chronicle, builders reinforced the foundation by filling fissures with stone and packing them down using elephants whose feet were wrapped in leather to prevent injury.

The bricks themselves were an engineering achievement in their own right — a precise mixture of roughly 60% fine sand and 35% clay, strong enough to withstand significant compressive loads, with one side deliberately roughened to improve bonding. The exterior plaster incorporated an unusual mix of seashells, sugar syrup, egg whites, coconut water, plant resin, and clay, while copper sheets and arsenic-treated sesame oil were used beneath the foundation to deter insects and plant intrusion.

Ruin, Rediscovery, and Restoration

Like much of Anuradhapura, Jetavanaramaya suffered repeated damage from South Indian invasions, and fell into serious disrepair after the kingdom was abandoned as the capital in the 11th century. King Parakramabahu I attempted a major restoration in the 12th century, but in the process the stupa was rebuilt to a reduced height — the origin of its current 71-meter (233-foot) form, still little more than half its original scale.

By the early 20th century, the entire structure had disappeared beneath shrub jungle, and its clearance became a slow, complicated process involving several monks and false starts before proper archaeological work resumed. Anuradhapura was formally designated a UNESCO World Heritage Site in 1982, and further conservation work in the late 1990s was funded largely through ticket sales from visitors to the Cultural Triangle's three main sites — Anuradhapura, Polonnaruwa, and Sigiriya.

What Remains Today

• The stupa itself — 71 meters tall, with a circumference of roughly 366 meters and a base area exceeding 233,000 square meters, still the largest of its kind by volume anywhere in the world
• The monastic complex — the wider Jetavana Vihara once housed an estimated 10,000 monks, with every building in the complex oriented toward the stupa
• The Jetavanaramaya Museum — displaying artifacts recovered from the site, including nine inscribed gold plates bearing Mahayana Buddhist text
• A sacred relic — the stupa is traditionally believed to enshrine part of a sash or belt worn by the Buddha

Visiting Jetavanaramaya

The site sits within Anuradhapura's Sacred City complex, close to Ruwanwelisaya and the Abhayagiri monastic ruins, and is generally covered under the standard Anuradhapura Cultural Heritage Ticket required of all foreign visitors. Most travelers combine it with the nearby Ruwanwelisaya stupa and Sri Maha Bodhi tree in a single day of sightseeing — see our guide to Ruwanwelisaya, the Great Stupa of Anuradhapura for how the two compare and connect historically.

Best Time to Visit

Anuradhapura's dry-zone climate stays warm for much of the year, with the clearest, most comfortable conditions generally falling between December and April. Early morning visits help you beat both the heat and the midday crowds.

Getting to Anuradhapura

Anuradhapura sits roughly 200km north of Colombo, making it a natural stop on a wider Cultural Triangle road trip alongside Sigiriya and Dambulla. A self-drive rental gives you the flexibility to explore Anuradhapura's spread-out ruins at your own pace — see our broader guide to important tourist places in Sri Lanka for how it fits into your itinerary.

Final Thoughts

Jetavanaramaya deserves far more recognition than it typically gets — a structure that once rivaled the pyramids of Egypt in scale, built from an act of royal remorse, and preserved through centuries of jungle, ruin, and painstaking restoration. Standing at its base today, it's hard not to feel the weight of what ancient Anuradhapura's engineers and laborers actually achieved, seventeen centuries on.