Yungang Grottoes

Stand still for a moment and feel the air. It is dry here, west of Datong, and it carries a faint mineral smell — warm sandstone, dust, the cliff itself. In front of you, a long wall of golden-brown rock runs from east to west. It is pierced by hundreds of dark openings. Inside many of them, faces look back at you. Some are taller than a house. Some are smaller than your hand.

These are the Yungang Grottoes, a complex of Buddhist cave temples cut into the southern face of Wuzhou Mountain. The cliff stretches for roughly a kilometre. Along it, carvers hollowed out more than two hundred and fifty caves and niches. Within them stand tens of thousands of statues. Almost all of this work was done in a few decades, in the second half of the fifth century and the first years of the sixth.

To understand why it happened here, you need to picture Datong as it was then. The city had a different name — Pingcheng — and it was a capital. The rulers were the Northern Wei dynasty. They came from the Tuoba clan of the Xianbei, a people from the northern steppe who had moved south and taken control of northern China. For much of the fifth century, this frontier city was the centre of their power.

Here is the first surprise. Just before these caves were begun, Buddhism in this kingdom had nearly been wiped out. In the 440s, the emperor Taiwu turned against the faith. Monks were killed, and temples and images were destroyed. After his death, his successors restored Buddhism. A monk named Tanyao was placed in charge of the clergy, and he proposed something permanent. Images carved into a mountain could not easily be burned or pulled down.

Tanyao's project became the first five great caves, which visitors today know as Caves 16 to 20. They sit near the western middle of the cliff. Each one holds a single giant Buddha that fills almost the whole space. A popular and long-standing interpretation says these five figures were meant to honour five Northern Wei emperors. Scholars still debate the exact identities. But the idea shows how closely faith and throne were tied together here.

The most photographed of these is Cave 20. Its front wall collapsed long ago, so the great seated Buddha now sits in the open air. Look at the face. It is broad and calm, with a faint smile, long ears, and a strong nose. The shoulders are wide and heavy. Many people find this figure more moving because it is exposed. Wind, rain, and light now touch it directly, as they have for centuries.

Now look closely at the robes on the early figures. The folds are tight, close to the body, and sometimes leave one shoulder bare. This style travelled east along the Silk Road, from India and from Gandhara — an ancient region in what is now Pakistan and Afghanistan, where Greek and Indian art once mixed. Traders, monks, and craftsmen carried these forms across Central Asia. At Yungang, they met Chinese hands and northern steppe tastes.

Walk east, and the style changes. In the later caves, the robes become loose and layered, with wide sleeves and flowing hems. This is the look of Chinese court dress. The shift follows a political turn. The emperor Xiaowen pushed his court to adopt Chinese customs, language, and clothing. In 494, he moved the capital south to Luoyang. After that, major imperial work here slowed, and smaller projects continued for some years.

The twin caves numbered 5 and 6 deserve your time. Their entrances are covered by multi-storey wooden temple fronts, added much later, during the Qing dynasty. Inside Cave 5 sits the largest Buddha at Yungang, a seated giant whose knees alone are taller than a person. Cave 6 is very different. A thick central pillar rises from floor to ceiling, and almost every surface is covered with carved scenes. Many of them tell episodes from the life of the Buddha.

Here is a detail many visitors walk past. Look for traces of colour. The caves were once painted, and in sheltered corners you can still see reds, greens, and blues on the stone. Some of this paint comes from later repairs rather than the fifth century. Even so, it changes the picture. These spaces were not quiet grey rooms. They were bright and dense with colour, lit by lamps and filled with chanting.

Another surprise waits in Cave 12, often called the Music Cave. Along its upper walls, small carved figures hold instruments — flutes, drums, stringed instruments, and others that scholars use to study the music of this period. Stand beneath them and look up. Imagine the sound that the carvers were picturing: a heavenly orchestra, playing above the heads of the faithful. It is a rare glimpse of sound preserved in stone.

The cliff has also had to survive the modern world. Sandstone is soft, and it weathers. Datong is a coal city, and for years dust from trucks and nearby industry settled on the carvings. Conservation work has included rerouting traffic, clearing the surroundings, and controlling water seeping through the rock. In 2001, the grottoes were inscribed as a UNESCO World Heritage Site. That status brought international attention to their protection.

As you walk on, notice the small things between the giants. Tiny seated Buddhas repeat across whole walls, row after row, like a pattern on fabric. Each one was cut by a human hand with a chisel. Pause and look at the worn edges of a single niche. Then look back along the cliff, at the long line of openings in the golden rock. Fifteen centuries ago, people stood where you are standing, and they looked up at these same faces.