Boss (medieval architecture)
In medieval architecture, a boss is a stone or timber knob or protrusion, most commonly found in ceilings at the location of keystones in vaulting, expressing the junction between the intersecting ribs. Their original purpose was to conceal the complex mitred joints.
They are typically intricately carved with decorative features such as foliage, heraldic devices, animals, faces, and so on.
Bosses are commonly found in the medieval architecture of England rather than France, which is believed to be due to the greater height of French naves. By the 14th century, very ornate bosses were carved that depicting a series of narrative scenes. In the 15th century, fan vaulting was developed with long, pendant-like bosses.
Famous examples of bosses can be found in Westminster Abbey, London.
 Find out more
 Related articles on Designing Buildings Wiki
The IHBC lists quality providers of education and learning in the historic built environment, and emails a monthly recap of their upcoming events.
On Læsø, houses are thatched with thick, heavy bundles of silvery seaweed that have the potential to be a contemporary building material around the world.
For the first time in its history, England’s largest festival of heritage and culture will feature online events as well as in-person activities. Heritage Open Days (HODs) returns in September, thanks to support from players of People’s Postcode Lottery.
The Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA) shows the scale of the ‘missed opportunity’ if we continue to separate heritage policymaking and economic policymaking.
The resource format has proved to be a successful way of providing guidance for local authorities on crucial policy topics.
Insight into the smart ways to design building services to ensure they perform as designed without being over-engineered
Historic England (HE) has awarded £250,000 towards the restoration of the Union Chain Bridge, built in 1820, spanning the River Tweed near Berwick.
One of Ireland’s most distinguished architectural historians explores the differences between ‘restoration’ and ‘repair’ and Conservation ethics in issue 163 of CONTEXT.
Architects say buildings should be protected – to fight climate change, reports the BBC on recent evidence given to the Commons Environmental Audit Committee (EAC).
It includes articles on Rethinking Retrofit to not waste carbon and not damage buildings, Assessing Moisture in porous building materials, conserving the Burns Monument using lime grout and injection mortars, Curated Decay, and more.