The Guardian · 2026-10-25 06:00 UTC

Scientists Rediscover Technique Behind Ancient Roman Colour-Changing Glass

Researchers have successfully uncovered the method used to create the Lycurgus Cup, a 1,600-year-old Roman glass artifact that changes color depending on lighting. This breakthrough sheds light on the advanced optical engineering skills of Roman glassmakers, revealing how the cup shifts from jade green to ruby red under different light conditions.

Published by The Guardian. Meridian does not replace the original report.