Historic England 2020 Stained Glass Windows: Managing Environmental Deterioration, Swindon, published by Historic England in 2020 defines crown glass, or spun glass as a: “Method of producing sheet glass by hand. A bubble of molten glass is transferred onto a solid metal ‘punty rod’, or ‘pontil rod’, which can be spun between the hands of the glass blower. The blowing pipe is then cut away, and the molten glass spun using the punty rod until it suddenly opens out into a disc, or ‘table’. The earliest known crown glass in England dates from the 1440s; it was widely used for windows until the mid-19th century, when taxation by weight ceased and cylinder glass became cheaper.”
Archaeological Evidence for Glassworking, Guidelines for Recovering, Analysing and Interpreting Evidence, published by Historic England in 2018, defines a pontil scar as: 'The circular protrusion of glass left on a glass object after removal of the pontil iron, although it was ground away on finer vessels.'
 Related articles on Designing Buildings Wiki
A stunning Victorian Bath House has been uncovered during works on creating the city’s first public park in over 100 years.
The Inquiry is into ‘21st Century Places – Values & Benefits‘
The awards showcase the very best historic places and cultural sites from across the globe.
The IHBC’s latest Toolbox Guidance Note, on ‘Alterations to Listed Buildings’ has been issued following UK-wide consultation.
The ruins of Ousdale Burn Broch, north of Helmsdale in Caithness, had fallen into further disrepair over the past 130 years.
Europe’s largest air museum and Britain’s best-preserved Second World War airfield – has been included in Grade II* listing, even though technically too recent.
The College of Arts and Conservation has won the award for a for a project which provides or improves facilities for the community, including a £5.8M restoration of the College’s 126-year-old roof.
Completion of the restoration of Stowe House’s North Hall, largely funded by World Monuments Fund (WMF), came a step closer this summer with the installation of a statue of Mercury opposite the imposing Laocoön group installed last year.
The CREATIVE Conservation Fund helps the IHBC generate and distribute funds exclusively to deserving causes in built and historic environment conservation.
For years, there have been rumours whispered around Plymouth and Cornwall about so-called ‘nuclear tunnels’ that exist beneath the Tamar Valley.