The observational sketch was done in ink. One of my few urban sketches. The grandeur of the entire cathedral was too large for me to capture in my drawing but here's a little of what I did.
Skylight from Dialogues in Paradise by Can Xue.
The light shrank back into two dots. A dark shadow brushed by, a clumsy night bird that shrieked and swooped toward the skylight, its huge wings tapping the roof fiercely, echoing like thunder.