Last week, my wife and I were in Amsterdam for a couple of days. The historic house we were staying in, called Castrum Peregrini, belonged to the artist Gisèle d’Ailly van Waterschoot van der Gracht who hid two Jewish people in it from the Nazis during WWII. This is one of her paintings that the head of the foundation which takes care of the house showed us as part of a tour of the house. The painting is quite compact when folded but unfolds like this to reveal three additional panels, as its size triples. More about the artist here.