At the book signing after my panel at Book Group Expo, a reader asked what made me include the stained glass window. [Don’t worry… no plot spoiler. I’ll talk about it very generally.]
A number of years ago, I came across a newspaper article* discussing conservation of stained glass in European cathedrals. Apparently, the molten glass continues to move, infinitesimally slowly--somewhat like a glacier-- so that hundreds of years down the line, the soldering needs to be conserved. Soldering is the lead outline between the different colors of glass.
I found that idea very compelling, that the seemingly-static images of saints were slowly creeping from their bounds.
I also liked the idea that a medieval glass smith, while unable to know the future of his chemical handiwork, might intuitively guess that the glass still moved.
For my novel, having the subjects depicted in stained glass meant that they could still progress, and this worked for the notion of remembrance and legacy that I was looking for.
*I tried to google this particular article but was unable to locate it.
. . . .