№ 01What My Son Sanctuary actually was

My Son Sanctuary sits in a bowl of hills about 40 km southwest of Hoi An, ringed by mountains on every side. That geography is the whole point. Champa kings did not build here for defence or trade — they built here because a closed valley with a single stream running through it read, in the religious language they had adopted from India, as a natural mirror of Mount Meru and the cosmic order around it.

For a thousand years this was where Cham rulers came to be legitimised. A new king built a tower, dedicated it to Shiva under a name blending his own with the god’s, installed a linga, and had his lineage carved into stone. Then the next king did the same, next to it. What you walk through today is not one temple built once. It is more than seventy structures stacked across a millennium of kings each making the same claim in brick.

№ 02Bhadravarman and the stele that gave away a valley

The oldest evidence recovered at My Son Sanctuary belongs to King Bhadravarman, who ruled roughly 380 to 413 CE. He built a hall here containing a linga and dedicated it to Shiva under the name Bhadreśvara — a compound of his own name and īśvara, “lord”, the standard way of referring to Shiva.

That naming convention matters more than it sounds. By fusing his name with the god’s, Bhadravarman was not simply funding a temple; he was writing himself into the divinity worshipped there. Later kings repeated the formula with their own names, which is why the valley accumulated towers rather than replacing them.

He also erected a stele carrying an inscription that dedicated the entire valley to that sacred purpose. Not a plot, not a temple precinct — the whole basin. Everything built at My Son Sanctuary for the next nine centuries sits inside the boundary of that one text.

№ 03Reading My Son Sanctuary: why the towers have letters

The signs at My Son Sanctuary label everything with letters and numbers — A1, B5, C7, G — and nobody explains why. The system is French. When archaeologists first surveyed and excavated the valley under the colonial administration, they grouped the ruins by cluster and lettered them: A, A1, B, C, D, E, F, G, H, K, L, M, N.

The letters are not chronological and they are not a ranking. They are simply the order in which clusters were catalogued. This is why Group E, one of the letters furthest down the alphabet, contains some of the oldest surviving structures, while Group A holds what was until 1969 the single most celebrated tower on the site.

How to read a group in sixty seconds. Once you know the four building types, every cluster at My Son Sanctuary stops being a heap of brick and starts being a floor plan you can follow.

The standard sequence is gate, hall, tower, with the kosagrha off to one side. Not every group obeys it — Group H is arranged differently, and it only reopened to visitors after a long restoration — but once you have walked one group in that order, the rest of the valley reads itself.

The saddle roof is the detail worth hunting for. It is the one Cham shape with no equivalent in Vietnamese or Khmer building, and there is no mistaking it for anything else once you know to look up.

№ 04Which My Son Sanctuary groups deserve your time

People walk into My Son Sanctuary, photograph the first standing tower, and leave in forty minutes. If you have come this far, the circuit worth doing is short and specific.

• Groups B, C and D — start here. These are the best preserved at My Son Sanctuary and the most legible: you can still read the plan of a Cham temple complex on the ground, with the main tower, the gate tower and the long hall in relation to each other.
• Group D holds the sculpture. The long buildings in this group are used to display sandstone pieces recovered on site — altar bases, deity fragments, dancers. It is the closest thing to a museum inside the valley and most tour groups skip it.
• Group A is where you stand and think. A1 was considered the finest Cham tower ever built. What is there now is a foundation and a hole. It is worth the walk precisely because it is empty.
• Group E if you care about age. The fabric here is the oldest still standing, roughly 7th century, and it looks it — cruder, heavier, less ornamented than the 10th-century work.

№ 05Seven styles of Cham art — two of them born here

Art historians divide Champa architecture and sculpture into seven successive styles, and My Son Sanctuary is where most of them can be seen. Six of them are represented at My Son Sanctuary, which is why the site matters to specialists far beyond its size: you can follow almost the entire development of an artistic tradition inside one valley.

Two of those seven styles are named after towers here, because this is where they were first identified:

Standing in Group E and then walking to Group A is, in effect, watching several centuries of refinement happen. The earlier work is solid and blunt; the later work is taller, thinner-walled, and covered in carving.

№ 06Brick you can carve: how they built it

The question every visitor to My Son Sanctuary asks is how the bricks hold together, since no mortar joint is visible. That debate is genuinely unresolved and worth its own discussion. But there is a second, less famous fact about Cham brick that explains more of what you actually see.

Cham bricks are lighter and more porous than modern brick. That physical property allowed something unusual: the decoration was carved directly into the brick after the wall was built, rather than being moulded first and assembled, or applied as a separate render. Run your eye along a tower wall at My Son Sanctuary and you are looking at ornament cut into the standing structure.

• Sandstone did the heavy lifting where it mattered. Door frames, lintels, pedestals and free-standing sculpture are sandstone; the mass of the building is brick.
• Temples run on an east–west axis. The main sanctuary faces east, toward sunrise and the direction of the gods.
• The main tower is a kalan. Its stepped, tapering form represents Mount Meru — the cosmic mountain at the centre of the Hindu universe.
• The plan repeats. A kalan, a gate tower, a long hall for pilgrims, sometimes a repository building. Once you have read one group, the others become legible.

№ 07Kala, makara and the language of the carvings

The carving at My Son Sanctuary is not decoration in the modern sense. Each recurring motif carries a fixed meaning, borrowed from Indian temple tradition and then reworked in a distinctly Cham way.

The pattern across My Son Sanctuary is consistent: creatures and power at the bottom, plants and abundance in the middle bands, divinity at the top and in the dark chamber at the centre. A Cham tower is a diagram as much as a building.

№ 08What the steles actually say

Every temple at My Son Sanctuary had its own stele — an inscribed stone slab, written in Sanskrit or Old Cham, recording the founding king, his ancestry and his donation. French archaeologists recovered around 32 of them when the site was first excavated.

These steles are the reason we know anything at all about Champa chronology and about My Son Sanctuary itself. Cham temples have no dated foundation plaques in the modern sense; the steles are the dating evidence, the genealogy, and the political record all at once. They tell us who ruled when, whose son claimed what, and which king rebuilt which tower after which fire or war.

They also tell us how the kingdom saw itself. The inscriptions are in Sanskrit — the sacred and administrative language borrowed from India — but the kings are Cham, the place is Vietnam, and the fusion is the whole story of the civilisation.

№ 09Why My Son Sanctuary stopped

Building at My Son Sanctuary continued into the 13th and early 14th centuries, with the last major work associated with Jaya Simhavarman III. After that, the record thins and then ends.

The reasons are the usual ones for a kingdom losing its centre of gravity: Champa was pushed steadily south over several centuries as Dai Viet expanded, the political heartland moved away from this valley, and a sanctuary that only functions while kings keep endowing it stops functioning when the kings are gone. The jungle did the rest, and My Son Sanctuary was effectively lost until French scholars came looking in the late 19th century.

It was inscribed on the UNESCO World Heritage list in 1999. What survived a thousand years of use, several centuries of abandonment, and one week of bombing in 1969 is what you walk through now.

№ 10Questions people ask

Planning the trip rather than the history? Our full route guide covers getting there turn by turn, ticket prices and the timing that beats the tour buses: My Son by motorbike from Hoi An. Not riding? The shuttle bus guide compares the bus, a tour and a private car.

Updated August 2026. Dates, dynasties and group classifications follow published scholarship on Champa and the UNESCO World Heritage documentation for the site; Champa chronology rests largely on the surviving Sanskrit and Old Cham steles, and specialists differ on some attributions. Bhadravarman’s reign is generally given as c. 380–413 CE and the last major building phase is associated with Jaya Simhavarman III in the 13th–14th century. Inscribed on the UNESCO World Heritage list in 1999.