Silk Roads: the Routes Network of Chang'an-Tianshan Corridor
This property is a 5,000 km section of the extensive Silk Roads network, stretching from Chang’an/Luoyang, the central capital of China in the Han and Tang dynasties, to the Zhetysu region of Central Asia. It took shape between the 2nd century BC and 1st century AD and remained in use until the 16th century, linking multiple civilizations and facilitating far-reaching exchanges of activities in trade, religious beliefs, scientific knowledge, technological innovation, cultural practices and the arts. The thirty-three components included in the routes network include capital cities and palace complexes of various empires and Khan kingdoms, trading settlements, Buddhist cave temples, ancient paths, posthouses, passes, beacon towers, sections of The Great Wall, fortifications, tombs and religious buildings.
This property is a 5,000 km section of the extensive Silk Roads network, stretching from Chang’an/Luoyang, the central capital of China in the Han and Tang dynasties, to the Zhetysu region of Central Asia. It took shape between the 2nd century BC and 1st century AD and remained in use until the 16th century, linking multiple civilizations and facilitating far-reaching exchanges of activities in trade, religious beliefs, scientific knowledge, technological innovation, cultural practices and the arts. The thirty-three components included in the routes network include capital cities and palace complexes of various empires and Khan kingdoms, trading settlements, Buddhist cave temples, ancient paths, posthouses, passes, beacon towers, sections of The Great Wall, fortifications, tombs and religious buildings.
Outstanding Universal Value
Brief synthesis
The Silk Roads were an interconnected web of routes linking the ancient societies of Asia, the Subcontinent, Central Asia, Western Asia and the Near East, and contributed to the development of many of the world's great civilizations. They represent one of the world’s preeminent long-distance communication networks stretching as the crow flies to around 7,500 km but extending to in excess of 35,000 km along specific routes. While some of these routes had been in use for millennia, by the 2nd century BC the volume of exchange had increased substantially, as had the long distance trade between east and west in high value goods, and the political, social and cultural impacts of these movements had far-reaching consequences upon all the societies that encountered them.
The routes served principally to transfer raw materials, foodstuffs, and luxury goods. Some areas had a monopoly on certain materials or goods: notably China, who supplied Central Asia, the Subcontinent, West Asia and the Mediterranean world with silk. Many of the high value trade goods were transported over vast distances – by pack animals and river craft – and probably by a string of different merchants.
The Tian-shan corridor is one section or corridor of this extensive overall Silk Roads network. Extending across a distance of around 5,000 km, it encompassed a complex network of trade routes extending to some 8,700 km that developed to link Chang’an in central China with the heartland of Central Asia between the 2nd century BC and 1st century AD, when long distance trade in high value goods, particularly silk, started to expand between the Chinese and Roman Empires. It flourished between the 6th and 14th century AD and remained in use as a major trade route until the 16th century.
The extremes of geography along the routes graphically illustrate the challenges of this long distance trade. Falling to 154 metres below sea level and rising to 7,400 metres above sea level, the routes touch great rivers, alpine lakes, crusty salt flats, vast deserts, snow-capped mountains and ‘fecund’ prairies. The climate varies from extreme drought to semi-humid; while vegetation covers temperate forests, temperate deserts, temperate steppes, alpine steppes and oases.
Starting on the Loess plateau at Chang’an, the central capital of China in the Han and Tang Dynasties, the routes of the Tian-shan corridor passed westwards through the Hosi Corridor across the Qin and Qilian Mountains to the Yumen Pass of Dunhuang. From Loulan/Hami, they continued along the northern and southern flanks of the Tian-shan Mountain and then through passes to reach the Ili, Chuy and Talas valleys in the Zhetysu Region of Central Asia, linking two of the great power centres that drove the Silk Roads trade.
Thirty-three sites along the corridor include capital cities palace complexes of various empires and Khan Kingdoms, trading settlements, Buddhist cave temples, ancient paths, posthouses, passes, beacon towers, sections of the Great Wall, fortifications, tombs and religious buildings. The formal system of posthouses and beacon towers provided by the Chinese Empire facilitated trade, as did the system of forts, caravanserai and way stations operated by states in the Zhetysu region. In and around Chang’an, a succession of palaces reflect the power centre of the Chinese Empire over 1,200 years; while the cities of the Chuy valley are witness to the power centre of the Zhetysu region from the 9th to the 14th centuries and their organisation of the long distance trade.
The series of Buddhist pagodas and large, elaborate cave temples extending from Kucha (now Kuqa County) in the west to Luoyong in the east, record the eastward transmission of Buddhism from India via Karakorum, and demonstrate an evolution in the design of stupas as local ideas were absorbed. Their elaboration reflects the sponsorship of local authorities and the central Chinese imperial government as well as donations of wealthy merchants, and the influence of monks that travelled the routes, many of whose journeys were documented from 2nd century BC onwards. Other religious buildings reflect the co-existence of many religions (as well as many ethnic groups) along the corridor including Zoroastrianism, the main religion of the Sogdians of Zhetysu region, Manichaeism in the Chuy and Talas valleys and in Qocho city and Luoyong, Nestorian Christianity also in Qocho city, around Xinjiang and in Chang’an, and Islam in Burana.
The massive scale of the trading activities fostered large, prosperous and thriving towns and cities that also reflect the interface between settled and nomadic communities in a variety of ways: the mutual inter-dependence of nomads and farmers and different peoples such as between Turks and Sogdians in the Zhetysu region; the transformation of nomadic communities to settled communities in the Tian-shan mountains, resulting in highly distinctive construction and planning such as semi-underground buildings; and in the Hosi corridor the planned agricultural expansion of the 1,000 mile corridor after the 1st century BC as an agricultural garrison and its transformation to settled agricultural communities. Diverse and large scale water management systems were essential to facilitate the growth of towns, trading settlements, forts, and caravanserai and the agriculture necessary to support them, such as the extensive Karez underground water channels of the extremely arid Turpan basin, many still in use, that supplied water to Qocho city, and were supplemented by deep wells inside Yar city; the grand scale of the network of open canals and ditches along the Hosi corridor that drew river water to the settlements, 90 km of which survive around Suoyang city; and in the Zhetsyu region, river water distribution through canals and pipes and collection in reservoirs.
As well as conduits for goods and people, the routes allowed the exceptional flow of ideas, beliefs and technological innovations such as those related to architecture and town planning that shaped the urban spaces and peoples’ lives in many fundamental ways.
Criterion (ii): The vastness of the continental routes networks, the ultra-long duration of use, the diversity of heritage remains and their dynamic interlinks, the richness of the cultural exchange they facilitated, the varied geographical environments they connected and crossed, clearly demonstrates the extensive interaction that took place within various cultural regions, especially the nomadic steppe and settled agrarian/oasis/pastoral civilizations, on the Eurasian continent between the 2nd century BC and the 16th century AD.
These interaction and influences were profound in terms of developments in architecture and city planning, religions and beliefs, urban culture and habitation, merchandise trade and interethnic relations in all regions along the routes.
The Tian-shan corridor is an extraordinary example in world history of how a dynamic channel linking civilizations and cultures across the Eurasian continent, realized the broadest and most long-lasting interchange among civilizations and cultures.
Criterion (iii): The Tian-shan corridor bears an exceptional witness to traditions of communication and exchange in economy and culture, and to social development across the Eurasian continent between the 2nd century BC to the 16th century AD.
Trade had a profound influence on the settlement structure of the landscape, through the development of towns and cities that brought together nomadic and settled communities, through water management systems that underpinned those settlements, through the extensive network of forts, beacon towers, way stations and caravanserai that accommodated travellers and ensured their safety, through the sequence of Buddhist shrines and cave temples, and through manifestations of other religions such as Zoroastrianism, Manichaeism, Nestorian Christianity and Islam that resulted from the cosmopolitan, multi-ethnic communities that organised and benefitted from the high value trade.
Criterion (v): The Tian-shan corridor is an outstanding example of the way high value, long-distance trade prompted the growth of sizeable towns and cities, supported by elaborate, sophisticated water management systems that harvested water from rivers, wells and underground springs for residents, travellers and the irrigation of crops.
Criterion (vi): The Tian-shan Corridor is directly associated with Zhang Qian’s diplomatic mission to the Western Regions, a milestone event in the history of human civilization and cultural interchange in the Eurasian Continent. It also reflects in a profound way the tangible impact of Buddhism into ancient China which had significant impact on cultures of East Asia, and the spread of Nestorian Christianity (which reached China in 500 AD), Manichaeism, Zoroastrianism and early Islam. Many of the towns and cities along the corridor also reflect in an exceptional way the impact of ideas that flowed along the routes related to harnessing water power, architecture and town planning.
Integrity
The nomination sets out clearly why the nominated series as a whole should be seen to have integrity and, through a detailed analysis, how each of the individual sites can also be seen to have integrity.
The overall series adequately reflects the significant characteristics of the Tian-Shan corridor and the attributes of Outstanding Universal Value in terms the representation of towns and cities, smaller trading settlements, transport and defence facilities, religious sites and tombs and water management. The one area that could be strengthened is the ensemble of way stations, beacons, watch towers and caravanserai that facilitated regular trade and reflects the everyday use of the route. One watch tower has been nominated and one post house. Although these are significant, they do not fully demonstrate the extent of the formal support that was provided for trade and travellers. The numerous sites of beacon towers and forts that survive between the Hoxi corridor and the Tian-shan range need further survey and research in order to identify those that might be added to the series. Likewise formal structures in Zhetysu region also need further identification and research.
In terms of individual sites, although it is recognised that some are vulnerable in the face of pressure including urban, rural development, infrastructural development, tourism or changes in agricultural practices, for the majority of these the pressures are adequately contained. There is a need to ensure that new interventions such as screen walls at some sites built in traditional style do not confuse the archaeological record.
For some sites, in order to fully understand the relationship between urban areas and their surrounding desert landscapes, and in particular the trade routes, there is a need for further ground surveys or remote sensing of surrounding areas.
The extensive, intact water management systems, necessary for their survival, are currently outside the boundaries of some sites and in some cases outside the buffer zones. Consideration needs to be given to assessing the way these water management systems contribute to the integrity of the sites and in places minor adjustments to the boundaries need to be considered.
Authenticity
The overall series includes adequate sites to fully convey the particular strengths and characteristics of this Tian-shan corridor. The authenticity of individual sites is mostly satisfactory.
If the full value of these sites is to be clearly conveyed, then more surveys, research and explanation are needed to show how the sites relate to the routes to which they are linked and, in the case of settlements, to show how they survived in desert areas through the use of sophisticated water management techniques.
In the Zhetysu region, all the eleven archaeological sites are backfilled and covered for protection and to control deterioration, which in the current absence of adequate means to stabilise exposed bricks is essential. Fully understanding the significance of the remains is difficult. There is a need to explore innovative ways of highlighting the scope and range of urban functions.
There is also a need for more archaeological and academic research to clarify the functions particularly of urban sites and to link them more clearly through interpretation to the ancient routes to which they were associated.
Protection and Management requirements
An Intergovernmental Coordinating Committee for the overall Silk Roads was formed in 2009. This is a steering committee composed of representatives of all States Parties involved in the nominations of all Silk Roads corridors. The ICOMOS International Conservation Centre – Xi’an (IICC-X) is the Secretariat for Committee. The Committee oversees the development of trans-national serial nominations of corridors identified in the ICOMOS Silk Roads Thematic Study. In terms of management, this Committee aims to implement a coordinated management system based on mutual agreement and to provide guidelines on conservation principles, methods, and management.
For the Tian-shan corridor, the formal agreement between all the participating States Parties in the Committee has been augmented with a specific agreement between the three States Parties, in particular for the coordinated management of the sites in the corridor. A first agreement between the three States Parties was signed in May 2012 and a further detailed agreement was signed in February 2014. These agreements set out the management mechanisms, and identify principles and rules of conservation management. They also set out suggestions for exchange and collaboration on conservation, interpretation, presentation and publicity. The Steering Committee for the corridor consists of Vice Ministers. There is also a Working Group consisting of two experts and one government official from each State Party, and a Secretariat - the ICOMOS International Conservation Centre in Xi’an (IICC-X). Regular meetings are held between the three States Parties. Collaboration is supported by the development of an on-line platform at the IICC-X. This is in three languages, English, Russian and Chinese. It collects and promotes information on the conservation initiatives along the Silk Roads.
This international collaboration needs to be supported by national collaboration, particularly in Kazakhstan and Kyrgyzstan, if the many fragile archaeological sites are to share information on the most advanced techniques and conservation measures that are appropriate and beneficial for the sites. Within China, this management structure is well developed and appears effective. Within Kazakhstan and Kyrgyzstan this collaboration needs to be reinforced.
Management Plans are in place for all the individual sites in China. For Kazakhstan a timetable for developing detailed management plans that would provide strategies for conservation and visitor management, including interpretation, for all sites had been approved and the work will be undertaken between 2014 and 2016. It is essential that these plans go beyond archaeological excavation to encompass on-going management, site surveillance, conservation, environment protection and tourism management. In Kyrgyzstan, all three sites have management plans for 2011 – 2015 that include proposals for improving the conservation of the sites, visitor facilities, and monitoring.
Although the need for tourism plans is acknowledged in each of the three countries, and these have been put in place in China and are being implemented, and a plan has been approved for the Chuy Valley, there is an urgent need to tourism plans to be put in place for the remaining sites and implemented to ensure they are well prepared for an increase in visitors, who do not become the agents of their destruction.
As the majority of the thirty-three nominated sites are archaeological sites, there is also need for good information that allows understanding of their layout, function and history, why they are of significance and particularly their relationship to the Silk Roads routes, to water and its management which was so crucial for survival, to trade and to each other. Many are associated with remarkable finds but these are often in museums some distance from the sites. And these museums do not always provide specific information about the Silk Roads and how they relate to the sites. Given the scale and scope of the Tian-shan corridor and the remoteness of some sites, there is a need for innovative techniques to provide the necessary information and interpretation.
The magnitude of this Silk Roads corridor, the number of sites, the comparative fragility of many of them and the enormous distances between them, makes monitoring a formidable task. Nevertheless monitoring (combined with adequate physical protection) is a crucial tool. In China all sites have up to date monitoring equipment. How this data is analysed and used will be crucial and more capacity building for these tasks would seem to be required. In the more remote sites in Kazakhstan, regular monitoring by trained staff is unlikely to be totally adequate (or in places technically feasible) and needs to be augmented by other means. In this context, the involvement of local communities needs to be encouraged.
As with It is also recommended that the latest approaches to remote sensing and video links are explored that might be used to support staff on the ground in both Kazakhstan and Kyrgyzstan.
Source: UNESCO/CLT/WHC
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