The phrase hints at a mesmerizing artistic technique, often involving a meticulous overlay (superposition) of images—specifically 16 exposures or angles—of a iconic bridge, likely the historic Pont Neuf in Paris or a similar European structure.
Have you ever looked at a landmark and seen it in a dozen different ways simultaneously? Superposition de pont Rejaun 16x
If you are looking to create a "16x" superposition of your own, here is the basic process: The phrase hints at a mesmerizing artistic technique,