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# Scientists Recreate the Roman Lycurgus Cup’s Color-Changing Magic
- URL: https://romanempiretimes.com/roman-lycurgus-cup-color-changing-glass-recreated/
- Published: 2026-10-29T23:37:30.000Z
- Updated: 2026-10-29T23:37:30.000Z
- Description: Four months of trials led to glass inspired by the Lycurgus Cup. The latest stage brings it into Elliot Walker’s sculpture for Sheffield’s Festival of the Mind.
- Author: George Liapis
- Tags: Roman Empire News, Lycurgus Cup, Roman glass, gold, silver

Researchers at the University of Sheffield have recreated the green-to-red appearance of the Lycurgus Cup and developed the material for a new glass sculpture. The project has moved from an experimental sample shown in 2025 to the larger practical challenge of supplying glass that an artist can work in a studio.

The fourth-century Roman vessel in the British Museum appears green in reflected light and red when light passes through it. Sheffield's reconstruction uses modern ingredients and equipment to reproduce this optical behaviour, known as dichroism. Its development has been reported in scientific conference abstracts in 2025 and 2026.

Our [earlier account of the Lycurgus Cup](https://romanempiretimes.com/roman-nanotechnology-the-case-of-the-lycurgus-cup/) examines the ancient object's chemistry, carving and mythological scenes. The new work follows the route from that analytical knowledge to making a usable material: trial melts, changing furnace conditions, production for a sculpture and a public display opening in Sheffield this November. To us, the video produced and shared further below, is mesmerizing.

![Full view of the Lycurgus Cup, showing Lycurgus entangled in carved vines above its metal foot.](https://storage.ghost.io/c/aa/80/aa80281a-abce-4f35-865f-05153c8cc335/content/images/2026/10/lycurgus-cup-full-view-thaler-tamas.jpg)

Lycurgus entangled in vines on the fourth-century cup in the British Museum. Photograph: [Thaler Tamas / Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Lycurgus-cup%5FFotoThalerTamas.jpg?ref=romanempiretimes.com), [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/?ref=romanempiretimes.com).

## Four months of trials before the first display

The initial challenge was to make glass with optical characteristics resembling the Roman cup for an exhibition about light. A 2025 scientific abstract describes four months of experimental work, beginning with published studies of the vessel and research into Roman glass manufacture, essentially providing the starting point for the experimental batches.

The researchers changed the ingredients going into the melt and the conditions under which the glass was made, seeking to approximate ancient starting materials. A sample with a similar colour effect emerged the day before the exhibition opened. The team subsequently continued its trial melts and began characterising the glass against the Roman object.

The first sample appeared at LightFest, which ran at Sheffield's Millennium Gallery from 13 to 16 March 2025\. The project subsequently developed towards producing material for a commissioned artwork, the next stage documented in the researchers' 2026 conference abstract.

## Getting gold and silver into the right form

Glass technician Lisa Hollands worked with Roman-glass specialist Caroline Jackson to develop a base glass using modern materials. The next problem was introducing small amounts of gold and silver in a form that would produce the desired colours. Trials varied furnace types, starting ingredients and oxygen conditions; some experiments even included sugar.

Earlier analysis of the ancient vessel explains why composition alone is insufficient. Its colours depend on tiny metallic particles within the glass, and their formation is sensitive to heat treatment and chemical conditions. The concentration and size of those particles help determine the appearance of the finished material.

Microscopy of the Roman glass identified particles containing a silver–gold alloy, with copper also present. Some silver remained dissolved in the surrounding glass. Achieving the optical effect therefore involves controlling what happens to the metals during processing, as well as choosing the ingredients that enter the furnace in the first place. It is made clear, that calling the Lycurgus Cup an ancient *nanotechnology* object, might actually be a spot-on description.

## Earlier reconstructions took different routes

Modern attempts to reproduce the Cup's appearance have a longer history. Research published in 2007 illustrates a glass blank made at Corning in the 1960s, photographed in reflected and transmitted light. That experimental vessel reproduced the thick starting form from which the ancient cup's elaborate decoration could have been cut.

A separate study published in 2020 reproduced a related green-and-red effect in plastic. The researchers prepared gold and silver nanoparticles separately, dispersed them in polyvinyl alcohol and made a composite that could be processed into printer filament. An ordinary fused-deposition 3D printer then shaped the material into demonstration vessels.

The plastic experiments showed how metal particles could give a printable plastic two contrasting appearances. Gold helped shift the transmitted colour towards red, although the researchers described their final colours as duller than the original's. Sheffield's current project pursues the effect in glass and takes it into the hands of a glass artist.

## Turning a laboratory sample into an artist's material

A 2026 abstract prepared for the Society of Glass Technology's annual meeting in Cambridge set out the project's next stage. The programme listed it in the Heritage & History session on 9 September. Its focus extended from developing the glass in the laboratory to the practical challenges of increasing production.

The work brought Sheffield's researchers together with glass artist Elliot Walker of Blowfish Glass UK in Stourbridge. The abstract follows the design's progression into studio production and includes photographs of an early studio trial. Shown side by side under reflected and transmitted light, the trial demonstrates the two appearances of the newly made material.

The Roman cup's construction provides a second point of comparison with the new artwork. Its carved figures stand away from the vessel, attached by small connecting bridges, all made from one piece of glass. Walker's sculpture uses a blown element to demonstrate the reconstructed material's response to light in a new form.

## A cup replaces Atlas's globe

Walker designed a classical-looking figure that combines the story on the ancient cup with the Farnese Atlas sculpture. In his new composition, a cup replaces the globe. A blown element was needed because the work had to show light passing through the specially made glass, as well as reflected from it.

![The Farnese Atlas supporting an engraved celestial globe at the National Archaeological Museum in Naples.](https://storage.ghost.io/c/aa/80/aa80281a-abce-4f35-865f-05153c8cc335/content/images/2026/10/farnese-atlas-roberto-de-martino.jpg)

The **Farnese Atlas* at the National Archaeological Museum in Naples, an ancient inspiration for Elliot Walker’s new glass sculpture. Photograph: [Roberto De Martino (Dr.Conati), public domain](https://commons.wikimedia.org/wiki/File:Atlante.JPG?ref=romanempiretimes.com).

The original vessel depicts Lycurgus's punishment for opposing Dionysus, the Greek god of wine. A vine entangles the king among the god and his followers. The imagery belongs to the religious world discussed in our account of [the Roman worship of Bacchus](https://romanempiretimes.com/bacchanalia-romes-forbidden-festival/); Walker carries the story into a new form.

The glass itself is expected to be used mainly for decoration. The university links the work's wider scientific value to understanding crystallisation, with potential benefits for photonic materials and glasses used to immobilise radioactive waste. Those applications concern knowledge of glass processing, alongside the material's immediate use in the sculpture.

The university’s [film about the Lycurgus Project](https://www.youtube.com/watch?v=h%5Fxciej0mFo&ref=romanempiretimes.com) presents the new sculpture and its colour-changing glass. Video: The University of Sheffield Player, 26 October 2026.

## A November debut, then a permanent museum home

The sculpture will appear in *Ancient Secrets, Modern Light: The Lycurgus Project* at Millennium Gallery during Sheffield's Festival of the Mind, from 6 to 15 November 2026\. The exhibition listing describes visitors seeing its appearance change as light moves around the sculpture, making the reconstructed effect the centre of the display.

Millennium Gallery is at 48 Arundel Gate in Sheffield city centre. The listed hours are 11am–5pm Tuesday to Saturday and 11am–4pm on Sunday. Festival events and exhibitions are free. After the festival, the sculpture is intended for permanent display at the university's Turner Museum of Glass.

The work grew from LightFest's wider programme about light and materials, organised through the Sheffield–Bristol Molecular Photonic Breadboards project. Its Roman starting point now has a tangible public outcome: newly made glass that can be worked into a sculpture and shown under lighting that reveals its two contrasting colours, marking a Roman invention's timeless journey, two millennia afterwards.

🏛️

Related reading: Our account of [the Roman legend of flexible glass](https://romanempiretimes.com/have-romans-discovered-an-indestructible-glass/) follows another ancient story about an extraordinary glass vessel.

#### ****🏛️ Sources used:**

[University of Sheffield, “Technician cracks 1,600-year-old mystery to replicate Roman masterpiece” (26 October 2026).](https://sheffield.ac.uk/news/technician-cracks-1600-year-old-mystery-replicate-roman-masterpiece?ref=romanempiretimes.com)  
  
[Lisa Hollands, Caroline Jackson and John Parker, “Reproducing the colours of the Lycurgus Cup,” Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B 66(4) (2025), 196\. Conference abstract.](https://www.ingentaconnect.com/content/sgt/ejgst/2025/00000066/00000004/art00084?ref=romanempiretimes.com)  
  
[Lisa Hollands, Christina Metcalfe, Elliot Walker, John Parker and Russell Hand, “The Lycurgus Project – a modern take on an ancient artifact,” Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B 67(4) (2026), 172\. Conference abstract and meeting programme.](https://cdn.ymaws.com/sgt.org/resource/collection/3C18E869-C5B8-4E08-956B-C02A20DD7D60/PC67%5F4%5Fonline.pdf?ref=romanempiretimes.com#page=82)  
  
[Ian Freestone, Nigel Meeks, Margaret Sax and Catherine Higgitt, “The Lycurgus Cup – A Roman Nanotechnology,” Gold Bulletin 40(4) (2007), 270–277.](https://link.springer.com/content/pdf/10.1007/BF03215599.pdf?ref=romanempiretimes.com)  
  
[Lars Kool et al., “Gold and silver dichroic nanocomposite in the quest for 3D printing the Lycurgus cup,” Beilstein Journal of Nanotechnology 11 (2020), 16–23.](https://www.beilstein-journals.org/bjnano/articles/11/2?ref=romanempiretimes.com)  
  
[University of Sheffield, “LightFest: illuminate your mind at a free festival exploring the wonders of light” (10 March 2025).](https://sheffield.ac.uk/city-region/news/lightfest-illuminate-your-mind-free-festival-exploring-wonders-light?ref=romanempiretimes.com)  
  
[University of Sheffield, Festival of the Mind 2026, “Ancient Secrets, Modern Light: The Lycurgus Project,” exhibition programme.](https://festivalofthemind.sheffield.ac.uk/2026/millennium-gallery/ancient-secrets-modern-light-the-lycurgus-project/?ref=romanempiretimes.com)