There was no single road
“Silk Road” is a modern label for a web of overland and sea routes that linked South Asia, Central Asia, Iran and China. Travellers rarely went from one end to the other. Goods, people and ideas usually passed through many hands, and the routes shifted with politics, climate and the fortunes of oasis towns. The same is true of Buddhism: it did not move as a single mission but as a slow, uneven process lasting many centuries.
Buddhism began in the Ganges plain of northern India. Its movement north-west and then east is usually described in broad stages, with dates that scholars still debate. Many of the details below rest on a mix of inscriptions, archaeology, translated texts and later tradition, so they are best treated as a general outline.
From the Ganges plain to Gandhara
Under Emperor Ashoka, in the third century BCE according to the usual dating, Buddhism gained royal patronage and its reach extended across much of the subcontinent. Edicts attributed to him have been found in the north-west, some in Greek and Aramaic, which suggests that Buddhist ideas were already reaching communities beyond the Indian heartland. The broader pattern is explored in our account of the spread of Buddhism.
The north-west, the region of Gandhara, became an important meeting point. Monasteries grew up around cities such as Taxila and in the Swat and Peshawar valleys, supported by merchants and local rulers. Under the Kushan rulers, in roughly the first to third centuries CE, the region was well connected to both India and Central Asia, and Buddhist monasteries there served as bases for travellers. The sculpture of this region is covered in our piece on Gandharan art.
Merchants, monks and monasteries
Monasteries and traders appear to have supported one another. Monasteries offered lodging, a shared language of religion and sometimes storage and banking-like services; merchants provided donations and carried news. Oasis towns along the Taklamakan Desert, including Khotan, Kucha, Turfan and others, became centres of Buddhist life, each with its own languages, local rulers and artistic style.
Texts travelled too. Scriptures were carried in Indian and Central Asian languages and translated into Chinese over several centuries. Translators of Central Asian or Indian origin worked alongside Chinese collaborators. The Mahayana sutras were especially important in this movement, though the sources show that different schools and teachings were present along the routes at different times.
Entering China
Traditional accounts place the arrival of Buddhism in China around the first century CE, in the Han period. The historical record is thin for the earliest phase, and the famous stories about a dream of the emperor are legendary in character. What is clearer is that by the fourth and fifth centuries there were significant translation projects, monastic communities and royal patronage in northern China.
From there, Buddhism continued east to Korea and Japan, a path sometimes called the northern transmission. It is distinct from the maritime and mainland routes to Sri Lanka and Southeast Asia, which carried a largely different set of traditions.
Pilgrims who wrote things down
Some of the best evidence comes from travellers who journeyed the other way, from China to India. The Chinese pilgrim monks Faxian (around 400 CE) and Xuanzang (in the seventh century) left accounts of the kingdoms, monasteries and holy places they visited, including Gandhara and Bamiyan. Their descriptions are valuable, though they reflect the writers’ own concerns and sometimes record hearsay. Archaeologists have often used them as guides, and sometimes found that the ground tells a more complicated story.
What survives on the ground
The routes left a series of monuments, many of them cut into rock because caves survive better than free-standing buildings. Among those usually discussed:
- The Bamiyan valley in Afghanistan, with its cliffs of cells and the niches of two giant Buddha figures.
- Taxila in Pakistan, with stupas and monasteries from the Gandharan period.
- The cave temples around Kucha, such as the Kizil Caves in Xinjiang.
- Dunhuang in Gansu, where the Mogao caves were decorated over many centuries.
- Sites in northern China such as Yungang and the Longmen Grottoes, which show how the style matured within Chinese patronage.
As Buddhism moved east, images and motifs changed with local taste. The Buddha figure that developed in Gandhara shows Mediterranean influence in its drapery; later versions in Central Asia and China absorbed local styles. Readers interested in how to identify these figures can look at our notes on Buddha iconography.
Decline and rediscovery
Over the centuries, several factors reduced Buddhism’s presence in parts of the route. Changes in trade patterns, the spread of other religions, shifts in political power and conflict all played a role, in different places at different times. Many oasis monasteries were abandoned and the desert preserved some of them. Western and Asian explorers of the nineteenth and early twentieth centuries documented sites and removed objects, a legacy that remains controversial. The process of recovery is part of what we describe under archaeological rediscovery.
Visiting the route today
Conditions vary enormously. Parts of the old route lie in areas where travel is restricted or discouraged, and conditions change. Before planning any journey, check current government travel advice, permit requirements and local conditions, and consult official heritage sources for opening arrangements. Many sites are fragile, so follow local guidance on photography and access. The individual articles on Bamiyan, Taxila, the cave sites and Gandhara explain each place in more detail.