Scientists examining a 2,000-year-old bronze chariot fitting from Britain have found that some of its blue glass decoration is likely of ancient Egyptian origin. The finding points to long-distance trade networks that brought foreign materials to Iron Age Britain. Researchers believe the glass reached Britain as imported beads before a craftsperson worked it into the object.
The artifact, known as a terret, belongs to the prehistoric collection at the Ashmolean Museum in Oxford. It dates from about 50 BCE to 75 CE, a period of major political and social change that spans the Roman invasion of Britain in 43 CE.
Scientists examine decorated chariot fitting
A terret is a small fitting attached to a horse’s harness to help guide the reins of a chariot. The Ashmolean example is particularly elaborate, with red and blue glass set into its bronze surface. The artifact comes from a period when ancient Britons maintained distinctive local traditions while also participating in wider networks of contact and exchange. Curators from the museum took the artifact to Diamond Light Source to investigate how it was made and where its materials came from.
A 2,000-year-old British chariot fitting held a surprising secret. 🔍
Scientists found that its blue glass likely came all the way from ancient Egypt, revealing long-distance trade links that connected Iron Age Britain to the wider ancient world. pic.twitter.com/HE1LyleiWc
— Tom Marvolo Riddle (@tom_riddle2025) September 22, 2026
Researchers examined the terret using the I18 microfocus spectroscopy beamline. The analysis allowed them to map the elements present across the artifact and compare the composition of its metal and glass. The results showed that the metal surface consisted mainly of copper and contained significant amounts of lead. The glass revealed a more complex story.
Researchers found an unusually high concentration of lead in the red glass. The blue glass contained mainly iron, along with smaller amounts of copper.
Blue glass points to Egypt
The chemical and elemental composition of the blue glass indicated that it could not have been produced in Britain. Instead, the evidence pointed researchers toward an Egyptian origin. Experts believe the material was imported to Britain as glass beads and later worked into the terret. Egypt had long been connected to expanding Mediterranean trade networks that moved goods and materials across great distances.
The red glass had a different history. Researchers identified it as a type commonly used by Iron Age communities in Britain from the Middle Iron Age through the first century CE. Finding the two types of glass together shows how craftspeople combined materials from different origins in a single object. The terret provides physical evidence of connections between local British traditions and wider trade networks around 2,000 years ago.
Such connections became increasingly visible during the Roman period, when goods, people and ideas circulated across Roman Britain and other parts of the empire. Susan Nehzati, a beamline scientist who helped facilitate the research at I18, said making the science conducted at Diamond accessible to the public was an important part of the project. The terret is on display in “Harnessing Power” in the Conservation Gallery at the Ashmolean Museum in Oxford.
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