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A GUIDE TO LOOKING UP

Look up where
the ribs meet.

The best carving in a medieval building is often the furthest away.

In a stone vault, the ribs cross at a projecting stone called a boss. Masons often carved and painted them with leaves, faces, beasts and stories, high above everyone's heads.

LOOK UP where the ribs cross

Explore a timeline
A long Gothic stone vault seen from below, its ribs meeting at a row of carved and softly painted roof bosses lit by daylight
AI-generated image, not a photograph of a real person or place.
  • Find the ribs
  • Follow them to the crossing
  • Read the carving
  • Stone stories, overhead

THE SHORT ANSWER

A boss is where
the ribs cross.

Part structure, part decoration.
Easy to miss unless you know to look up.

WHAT IT IS

The knot in the vault

A University of Pittsburgh glossary of medieval architecture defines a boss as a projecting stone at the intersection of the ribs of a vault, often the keystone and frequently carved.

Why ribs need them

THE RECORD

Norwich's ceiling

Norwich Cathedral says its medieval roof bosses are the biggest collection of their kind in the world, spread across the nave and the cloister.

See the numbers

THE CLOISTER

Leaves, faces and beasts

The cloister bosses include the famous Green Man carvings, foliage such as hawthorn and oak, and odd hybrid creatures.

Explore the timeline

A NORWICH TIMELINE

How old is
what you see?

Pick a moment in the story of Norwich Cathedral's bosses. The bar shows roughly how far back it sits, from the Norman foundation to a modern way of getting close.

Timeline

Choose a moment
The foundation stone1096

The bishop's seat moved from Thetford to Norwich in 1094, and the foundation stone of the new Benedictine cathedral and monastery was laid in 1096.

The cloister burns1272

On 11 August 1272 a dispute over rent in the Tombland marketplace became a riot, and most of the monastic buildings, including the cloister, were destroyed by fire.

The east walk rebuilt1297–1314

The east walk of the cloister, with its 14 bays, was rebuilt between 1297 and 1314. Its bosses are the earliest of the cloister set.

The cloister finished1430s

The rebuilding of the cloister, thick with tracery and sculpted, painted bosses, was not completed until the 1430s, partly because of the plague.

A slide in the nave2019

For 11 days in August 2019 a helter skelter stood in the nave so visitors could get closer than ever to the roof bosses.

Sources: Current Archaeology, Medieval Art of Death and Resurrection; Norwich Cathedral, Seeing It Differently.

Dates from Current Archaeology's feature on the Norwich cloister bosses and from Norwich Cathedral's own pages.

TWO NUMBERS WORTH KNOWING

A thousand carvings,
a long way up.

One figure on the size of the collection,
one on how keen people were to see it closer.

≈ 1,000

Sculpted and painted stone bosses at Norwich

Current Archaeology describes the thousand or so bosses on the vaults of the cloister, nave, presbytery and transepts as the largest surviving collection of such Gothic art from medieval Europe.

THE COLLECTION · CURRENT ARCHAEOLOGY

≈ 10,000

Helter skelter riders in 11 days, 2019

Norwich Cathedral says about 10,000 people rode the helter skelter installed in the nave in August 2019, which was designed to bring visitors closer to the bosses.

GETTING CLOSER · NORWICH CATHEDRAL

Current Archaeology notes that the bosses survived the Reformation, the Civil War era and Second World War incendiary bombing, and that rising damp in the cloister has been a more recent concern.

FOUR WAYS TO SEE MORE

Bosses reward
a slow look.

They are high, small and often in shadow. A few habits make them much easier to enjoy in any vaulted church, cloister or chapter house.

  • Find the ribs first

    Trace the stone ribs across the ceiling. Wherever they cross or meet, look for a boss.

  • Bring binoculars

    A small pair, or a phone's zoom, turns a dot of colour into a face, a leaf or a whole scene.

  • Follow the sequence

    At Norwich the nave bosses tell stories from Creation to the Last Judgement, so it pays to read them bay by bay.

  • Look for the odd ones

    Alongside the stories are green men, leaf spirals and strange hybrid creatures, often in the cloister.

A medieval cloister walk with a vaulted ceiling of carved bosses and sunlight falling through stone tracery onto the floor
AI-generated image, not a photograph of a real person or place.
Close view of a single carved stone roof boss of curling oak leaves where four vault ribs meet
AI-generated image, not a photograph of a real person or place.

WHY RIBS NEED A BOSS

Where the skeleton
comes together.

Britannica explains that medieval builders developed the rib vault, a skeleton of arches or ribs on which the masonry could be laid, using pointed arches that could rise as high over a short span as over a long one.

Where several ribs meet, a single stone has to receive them all. That junction stone, the boss, became an invitation to carve. At Norwich, one researcher found the cloister's east walk bosses were arranged in two sequences that diverge from outside the chapter house.

Questions

Questions people ask

What is a roof boss?

A projecting stone where the ribs of a vault cross. A University of Pittsburgh medieval architecture glossary notes it is often the keystone and frequently carved.

Where is the biggest collection?

Norwich Cathedral describes its medieval roof bosses as the biggest collection of their kind in the world, in the nave and the cloister.

How many bosses does Norwich have?

Current Archaeology puts it at a thousand or so sculpted and painted stone bosses, across the cloister, nave, presbytery and transepts.

What do the carvings show?

At Norwich the nave bosses tell Bible stories from Creation to the Last Judgement. The cloister has foliage, Green Men and other figures, including a hybrid that one researcher reads as a symbol of gluttony.

Was there really a helter skelter in Norwich Cathedral?

Yes. For 11 days in August 2019 a helter skelter stood in the nave as part of the Seeing It Differently project, and about 10,000 people rode it.

References

  1. Norwich Cathedral: Roof Bosses
  2. Norwich Cathedral: Seeing It Differently
  3. Norwich Cathedral: Cathedral highlights
  4. Current Archaeology: Medieval Art of Death and Resurrection
  5. University of Pittsburgh, Glossary of Medieval Art and Architecture: Boss
  6. Britannica: Vault (architecture)

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