The nave windows were donated by the guilds, and the symbols of the guilds are featured on them. The deep red color in some of the windows is not the result of a dye, but instead the result of a suspension of solid gold nanoparticles.In 2003, the Lenten cloth was restored and backed with a supporting material. It now weighs over a ton, and so must be carried from the workshop with heavy machinery for its use during Lent.