Not really a drawing

Have an idea for a painting. Not sure, so I took a photo and gave it a detailed going over. The drawing came out far nicer than it should. Still in two minds about how the painting might go..it is meant to be a tad experimental.

It’s the tower of Le Havre cathedral. The outside is a grey concrete building (a modern rebuild after severe wartime damage), but inside the light is beautiful. The painting is meant to replicate the inside outside.