I’m always interested to see how they do things in different parts of the world. These museum displays are from the Swiss Museum in Zurich.
What’s neat about them is that they are held off the wall an inch or so by black blocks beneath. The museum displays themselves are only a few millimeters thick, they looked like 3mm DiBond to me. The black blocks are inset a few inches all the way around, so you really don’t see them. The effect is that the photos “float” in space above the wall.
But the depth and floating effect of the spacers really adds to the look of the displays, and I enjoyed seeing them!