Depictions of church interiors by night were very popular in Netherlandish painting because they were considered proof of special skill. Only a few light sources penetrate the darkness, allowing individual architectonic details to emerge. A light source in the area of the choir elucidates the dimensions of the space; candles and torches highlight altars, organs, and epitaphs. Light sources with intensity creating different effects and emphasising the variety of Gothic architecture were consciously chosen. The interiors are painted on copper, which highlights the fineness and brilliance of the painting. Pieter Neefs the Elder is one of the painters who specialised in nocturnal church interiors.