I am currently going through the current crop of extended pinhole camera pictures and discovered that a camera had recorded a ‘ghost’ of a structure not present when the camera was put up or taken down. On the left side of the building there is a faint image of scaffolding which must have been in place for around half of the exposure (3 months). You can see more pinhole images in the gallery section of the website

Ghost of scaffolding captured in 6 month pinhole camera exposure