Cathedral glaziers remove 145-year-old stained glass window for restoration

The window was designed by the Pre-Raphaelite artist Sir Edward Coley Burne-Jones and designer and craftsman William Morris 145 years after it was first installed.

Featuring two huge figurative designs - Angeli Ministrantes (Angels Ministering) and Angeli Laudantes (Angels Praising) by Burne-Jones - that sit within Morris’s elaborate acanthus leaf design that reflects the medieval grisaille or grey-painted windows elsewhere in the Cathedral, the clergy did not well receive the windows at the time and what should have been a series of windows by the Pre-Raphaelite duo stopped at one.

The process of dismantling this priceless work of art and moving it to the Cathedral glass workshops began with the team carefully chipping away the neat cement mortar holding the window in place and untying the copper ties holding it to the internal framework. Once released, the team of three then lifted it out in 1.8 metres by 1.22 metres (6ft by 4ft) sections onto the exterior scaffold.

Head Glazier and conservator Sam Kelly said: “Despite their solid appearance, stained glass sections of this size can be fragile, and it is always a relief to get them into the workshop. They are also incredibly heavy (around 40 kilograms per section), so moving each section down off the scaffolding is physically difficult.

“Once we get it onto the lightboxes in the workshop, we will be able to see the extent of the deterioration and what conservation is required. Exposure to the elements, especially condensation internally caused by ancient heaters in the Cathedral (which have now been replaced) and water ingress have taken their toll. Painted details, especially on the faces and robes of the angels have faded over time, due to poor firing of the glass paint at the point of execution and the colours and patterns have been dulled by layers of accumulated dirt.”

As well as cleaning the stained glass and repairing the leadwork, Sam and his team will create painted and fired backing glasses to replace lost detail, these being plated with the original glass sections.

This technique will allow the strong linework that is characteristic of Burne Jones glass to be reinstated, returning this window to its originally intended appearance, without interfering with the original artwork.

Visitors looking up at the window when it is eventually reinstalled may be struck by how beautifully defined the work is, thanks to modern conservation techniques like this and the skill of the stained glass team, but it will be a slow process with restoration taking around two years.

The restoration of the window will cost an anticipated £120,000, but thanks to the generosity of The Dulverton Trust, along with other generous trusts and individuals, just over half the cost has been raised, and the team have been able to make a start on the much-needed conservation work and repair.

If you would like to help with this extraordinary project, click here to find out more.