The Astrologers of Afrasiab: What Pre-Islamic Murals Reveal About Indian Trans-Pamir Intellectual Networks

In 1965, construction workers laying a road across the mound of Afrasiab—the ancient heart of Samarkand—drove a bulldozer blade into the buried plaster walls of a seventh-century Sogdian palace (Afrasiab murals, Wikipedia). The accidental excavation exposed a room filled with vibrant, six-foot-tall wall paintings created between 648 and 651 CE under King Varkhuman (Afrasiab murals, Wikipedia).

While the western wall depicts a grand diplomatic procession of Turkish guards and foreign envoys, the eastern wall offers a different perspective (Afrasiab murals, Wikipedia). Though damaged by centuries of soil erosion and the initial roadwork, the surviving paint layers depict India not primarily through trade goods, but through intellectual imagery: a scholar-teacher instructing a student over a round celestial sphere (Encyclopaedia Iranica).

Archaeological analyses confirm that these murals were painted with imported lapis lazuli (lazurite), cinnabar, and carbon pigments laid over a white gypsum plaster base (MDPI Minerals). The deliberate layout of the palace room assigned distinct thematic geographic zones to each wall. China occupies the northern wall, Samarkand and the Iranian world cover the southern wall, and the eastern wall represents the Indian subcontinent (MDPI Minerals). In this Sogdian spatial arrangement, India appears framed as the domain of scholars, mathematicians, and star-gazers (MDPI Minerals).

The Astronomy on the Eastern Wall

Scholars debate the exact narrative of the damaged eastern wall, but several iconography elements remain visible (Encyclopaedia Iranica). On the left section of the eastern mural fragment, two figures in long tunics sit face-to-face (Encyclopaedia Iranica). Between them rests a circular object that art historians and epigraphers identify as a celestial globe or an armillary sphere (gola-yantra, a ringed model of heavy celestial circles) (Encyclopaedia Iranica).

Art historian Frantz Grenet observed that the stance of the figures reflects an iconographic tradition mapping the transmission of astronomical knowledge from Greco-Roman and Persian lineages into Central Asian and Indian academic circles (Encyclopaedia Iranica). Sogdian artists drew upon regional visual shorthands to symbolize Indian scholarship. Rather than filling the space solely with royal gifts or ivory, the painters chose to depict the mathematical transmission of positional astronomy (khagola-vidya, sky-sphere knowledge) (Encyclopaedia Iranica).

This visual choice aligns with seventh-century historical realities across the Trans-Pamir region. During the rule of the Western Turkic Khaganate and Sogdian city-states, trade caravans were accompanied by monks, physicians, and astronomers moving along the mountain passes between the Punjab, Bactria, and Transoxiana (Afrasiab murals, Wikipedia). Sogdiana served as an intellectual clearinghouse where Indian scientific texts were received, translated, and synthesized before the rise of Abbasid-era translation bureaus in Baghdad.

Siddhantas in Transit

The timeline of the Afrasiab murals coincides with a period of mathematical synthesis in India. In 628 CE, two decades before King Varkhuman commissioned the Afrasiab murals, the Indian astronomer Brahmagupta composed his Brahmasphutasiddhanta (Correctly Established Doctrine of Brahma) in Bhillamala (modern Bhinmal, Rajasthan). The text codified methods for computing planetary longitudes, solar and lunar eclipses, and trigonometric sine tables (jya).

Textual evidence shows that mathematical manuals (siddhantas, established astronomical treatises) traversed the Silk Road long before they were translated into Arabic as Zij al-Sindhind. Chinese dynastic annals from the Tang period record Indian astronomers serving in the Imperial Astronomical Bureau (Yantian Jian) in Chang'an during the late seventh century. Scholars such as Gautama Siddha (known in Chinese as Qu Tan Xi Da), who compiled the Kaiyuan Zhanjing (Kaiyuan Astrology Manual) in 718 CE, translated Indian trigonometric tables and zero-based positional notation directly into Chinese.

The eastern mural at Afrasiab captures this precise era of trans-Pamir exchange. The Sogdians, who managed trans-Eurasian trade networks, maintained a distinct interest in horoscope compilation and calendar reconciliation. A courtly calendar synchronism in Samarkand required matching solar solstices with local festival days, creating a practical demand for Indian positional astronomy (Cambridge University Press).

Epigraphic and Numismatic Evidence

Primary epigraphic evidence from the site reinforces the diplomatic reach depicted in the palace room. On the western wall, Sogdian cursive inscriptions carved onto the robes of painted envoys explicitly identify visiting ambassadors (Afrasiab murals, Wikipedia). One line reads:

"When King Varkhuman Unash came to him, the ambassador opened his mouth and spoke thus: 'I am the chancellor of Chaganian... I arrived here to Samarkand, to the king, and with respect to the king now I am here.'" (Afrasiab murals, Wikipedia)

The epigraphs confirm that the palace room served to document real political and intellectual ties connecting Transoxiana with neighboring states (Afrasiab murals, Wikipedia).

Numismatic hoards unearthed across Uzbekistan and Tajikistan offer parallel physical evidence of these trade corridors. Sogdian copper coins minted in Samarkand and Chach during the seventh century frequently adopt weight standards and iconographic formats influenced by both Sasanian silver drachms and Northern Indian coinage standards. Silver punch-marked and cast coins from northern Indian mints traveled along the river valleys of the Upper Oxus (Amu Darya), where Sogdian merchant guilds maintained permanent trade outposts (varzh).

The Afrasiab murals confirm that long before eighth-century scholars assembled in Baghdad to translate Sanskrit texts, pre-Islamic Central Asia served as an active node for Indian mathematical astronomy. On the plaster walls of seventh-century Samarkand, Indian scholars were not distant figures of legend, but recognized actors in an interconnected Eurasian intellectual network (MDPI Minerals).