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.
 Related articles on Designing Buildings Wiki
A Wikipedia entry for the IHBC, drafted by IHBC Chair James Caird, has now been published.
FREE application support MATE sessions: Nottingham (25/04), Belfast (31/05), Glasgow (7/06)
Project management for the Wordsworth Trust, closing 30/04, £40,000 contract.
The Heritage Alliance (THA) has published the first ever report on the independent heritage sector’s impact overseas, led by past THA CEO, Kate Pugh.
A new £27 million scheme is open for applicants to help improve England’s waterways, funded by the European Agricultural Fund for Rural Development.
The new two-year £1.8m scheme is to be piloted with expert advisors working across the urban and rural areas of Manchester and Suffolk.