Perhaps Maths students will soon be studying the "Bridges of the Euro" problem, instead of the "Bridges of Königsberg" problem. That will solve two issues:
* the name Königsberg has not been used by most of the world for many decades. The city itself goes by the name Kaliningrad, although younger people often use the nickname "König" for the city.
* the bridge count in now-Kaliningrad is not the same as in the famous puzzle.
(Yes, yes, I'm trying to show off that I went to Kaliningrad and checked out as many of the bridges as still existed.)
OK, here now an inside story(when I still was in school). One day, a close relative came home from work at ECB/EMI, a bit exhausted. This was the day they found out that the winning draft of the banknotes was indeed NOT FICTION but REAL buildings. This caused a little internal scandal, as I remember that a journalists discovered the real buildings in an art book. So the creator of the banknotes had to go back to draft and actually insert fictional buildings, modeled after typical styles of Europe. So at the very beginning of european banknotes, the subject of the OP post would have been the other way round.
This is interesting but the 5 euros note does not really represent a bridge but an Aqueduct (looking really like this one https://en.wikipedia.org/wiki/Pont_du_Gard). So you can't really walk on it like they show in their schematic proposal.
If you note the sale of the humans on the diagram, it's clear they're schematics of the actual bridges he built, not the theoretical inspiration which would be much larger.
Engineer nitpick: it's actually a cable-stayed bridge! Suspension bridges have hanging main cables in an arc between the towers, then the bridge is supported by smaller vertical connectors between the main cables and roadway.
It's supposed to look like a cable-stayed bridge, but it's probably just a beam. The cables seem decorative only. Look at those huge supports underneath.
Here's the real thing in a small bridge, the Mary Avenue bike bridge over Interstate 280 in Cupertino.[1] This is a very good looking bridge, and went up fast - only three nights of road closures to assemble the deck.
