British Museum blog

The Lycurgus Cup: transformation in glass

detail of Lycurgus cupBelinda Crerar, curator, British Museum

The Romans are famous for doing things ‘big’ – enormous private villas, the largest armies the world had ever seen, huge temples to house countless gods and of course, larger than life personalities. The power, wealth and splendour of Rome are clear to see when you approach the Late Roman and Byzantine displays in the Sir Paul and Lady Ruddock Gallery of Sutton Hoo and Europe, AD 300–1100. Facing you are cabinets full of gold and silver – hoards of tableware from Cyprus and Rome, bracelets and earrings encrusted with precious gems, gold crosses declaring a love of Christ in the most ostentatious way. It’s safe to say that the Roman aristocracy liked to show off their wealth, but, for the quantity of gold and silver used to craft the treasures in the gallery, the one that contains the least shines the most.

The Lycurgus cup being installed by project curator Rosie Weetch in Room 41

The Lycurgus cup being installed by project curator Rosie Weetch in Room 41

At the centre of the display is the Lycurgus Cup. A Late Roman diatretum, or cage cup, it was carved around the 4th century AD. Its exact provenance is unknown, but it was possibly created in Alexandria on account of the fine glasswork emerging from Egypt at this time. Decorated on all sides with figures painstakingly carved in high relief, the cup shows the myth of the Thracian king Lycurgus, who enraged the god Dionysus by expelling him from his kingdom and attacking his followers. Needless to say, things didn’t end well for Lycurgus, though precisely how depends on who told the story. The version depicted on the cup was told by Nonnus of Panopolis in his 48-book-long epic, the Dionysiaca. Nonnus recounts how Lycurgus attacked a female follower of Dionysus called Ambrosia. To save her, Mother Earth transformed her into a vine which ensnared Lycurgus as it grew. On the cup, Ambrosia lies on the ground in the moment of transformation while the hapless king fights for his life against the emerging tendrils. Dionysus watches, remorseless, while the fawn-legged god Pan and one of Dionysus’ followers taunt their victim and pummel him with rocks.

The carving is of exceptional skill and the preservation of the vessel is unparalleled, but the most impressive element of the cup’s design comes from an feature that cannot be seen with the naked eye. In reflected light the cup appears opaque olive green, but when transmitted light is shone through the glass, it changes to a rich and vibrant red. The effect is caused by nanoparticles of gold and silver within the glass, so tiny and in such small quantities that only in the last few decades has microscopic analysis with sufficiently high resolution been developed to detect them. As light passes through the glass the gold and silver particles scatter the waves, allowing those at the red end of the spectrum to pass though more easily, causing the dramatic colour change. The cup’s modern name is likely to be a misnomer: the original use for the vessel was possibly as a hanging lamp, only being transformed into a cup when the gilt-silver foot and rim band were added in the 19th century. As a lamp, flickering over the dinner table, the optical properties of the glass would be shown to their full effect for all to admire, although admittedly, no one has yet been brave enough to fill the fragile, 2000 year old vessel with wine and observe the effects of light through it when full.

The Lycurgus Cup, shown with transmitted light

The Lycurgus Cup, shown with transmitted light

AN01066991_544x725

The change of colour from green to red mimics the ripening of grapes, suitable for the Dionysian theme, but whether or not the dichroic effect was deliberate or the fortunate result of contamination in the molten glass is still unclear. Nonetheless, the optical trick of this rare form of glass delighted the Roman aristocracy so much that it attracted the attention of emperors: the author of the 4th-century Historia Augusta reports that the Emperor Hadrian sent ‘a cup that changes colour’ to his brother-in-law as a gift for his banquets. It would, after all, make a fantastic conversation piece, and if its later life is anything to go by – likely preserved above ground throughout the centuries, on account of its almost perfect state of preservation, acquired by the Rothschild family in the 1800s then bought by the British Museum in 1958 – the Lycurgus Cup has lost none of its appeal.

The Sir Paul and Lady Ruddock Gallery of Sutton Hoo and Europe, AD 300–1100 recently opened after a major re-display in Room 41. Admission is free.

If you would like to leave a comment click on the title

Filed under: Room 41, Sutton Hoo and Europe, AD 300-1100, , , , , , ,

Receive notifications of new posts by email.

Join 16,441 other followers

Categories

Follow @britishmuseum on Twitter

British Museum on Instagram

Around 3 million years ago our early ancestors collected and valued objects for their appearance. This pebble was perhaps picked up by an Australopithecus africanus because its natural shape suggests a face. Objects like this identify South Africa as one of the places where modern human behaviour began.

Experts have different views on whether this found object might be the first evidence of artistic thought. What do you think – is this art?

Discover this deep history in our #SouthAfricanArt exhibition – follow the link in our bio to find out more about this special exhibition.

The Makapansgat Pebble. Collected about 3 million years ago. On loan from Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg. 
#SouthAfrica #history #prehistory This is a great shot of a sarcophagus by @ss.shri – it shows how well preserved the 2,600-year-old craftsmanship is. It was made for Sasobek, who was the vizier (prime minister) of the northern part of Egypt during the reign of Psamtek I (664–610 BC). His face is naturalistic and shows the use of makeup, but it’s probably not an accurate likeness. Many human-shaped sarcophagi had exaggerated facial features during this period. 
Don’t forget you can share your photos with us by using #mybritishmuseum
#regram #AncientEgypt #statue #sculpture #Egypt #history #BritishMuseum Our Egyptian Sculpture Gallery (Room 4) spans over 3,000 years of history! The gallery contains iconic objects such as the Rosetta Stone – the key to deciphering ancient Egyptian hieroglyphs – and the colossal 7.25 ton statue of the pharaoh Ramesses II. What’s your favourite object in this gallery?
#AncientEgypt #Egypt #Thebes #RosettaStone #sculpture #statue #history #BritishMuseum #mybritishmuseum We love this strong image taken by @nickyhofland. These powerful figures of King Senwosret III stand in our Egyptian Sculpture Gallery (Room 4). He reigned from 1874 to 1855 BC. These representations of him are interesting because they aren’t idealised – you can see expressive lines and furrows on his face. This contrasts to earlier kings who appear youthful throughout their reign. The king also has peculiarly large ears in these statues, which perhaps symbolised his readiness to listen. If you’d like your photos to be regrammed, tag #mybritishmuseum

#regram #AncientEgypt #statue #sculpture #Egypt #history #BritishMuseum This striking mosaic was made around 500 years ago in Mexico. It’s a pectoral – a type of jewellery designed to be worn on the chest. Double-headed serpents (known as maquizcoatl) were considered to be the bearers of bad omens and were associated with figures of authority who may have worn this type of jewellery as part of a ritual process. The object is expertly decorated with tiny pieces of turquoise that create textures and shapes on the serpent’s ‘skin’. The eye sockets could have been inlaid with dark gemstones giving the impression of flickering eyes. 
#turquoise #Aztec #Mixtec #serpent #jewellery #Mexico #🇲🇽 Eagle costumes were worn by prestigious warriors in Mixtec and Aztec culture, and the handle of this knife, made around 500 years ago in Mexico, represents a crouching eagle warrior. In mythology the eagle represented the power of the day and was believed to carry the sun into the sky from the underworld each morning. This object is decorated with turquoise, malachite, and four types of shell, with a flint blade. Highly decorated knives like this one were probably used in ceremonies or symbolically rather than for practical tasks – the construction of this knife suggests it wouldn’t be sturdy enough to be used for cutting.

#Aztec #Mixtec #knife #eagle #turquoise #Mexico #🇲🇽
%d bloggers like this: