Interior of the Nieuwe Kerk, Delft, with a trompe l'oeil curtain

拍品的狀況可能存在極大差異，而由於其性質使然，拍品難以處於完美無瑕的狀態。拍品均以拍賣時的狀況出售。

The canvas is supported with a glue lining and the paint is stable on the support. There is a 5 inch vertical scratch at the lower left edge, and a 1 inch horizontal scratch with two corresponding losses nearby. Another small loss is seen at the upper right corner. Under natural light, a craquelure is seen in places. Discolored, greyish-white retouches are seen here and there across the painting. These appear to have been clumsily applied, and the extent of the damage beneath them is unclear. Under ultraviolet light, passages fluoresce faintly on the curtain, on the clock, and in places over the figures in the foreground. It appears that the painting has not been conserved in many years, and a sensitive cleaning should improve its appearance.