I learned from this book that Paris Métro has given copies of their iconic Art Nouveau station entrances to other metro cities around the world, and often received something in return. Hence, for instance, stained glass artworks by a Chigago artist on one of the Paris overground stations, and a Paris-style metro entrance in Montréal.

Now I can't help thinking how cool it would be if we could have one of those for the projected northern entrance of the Kaisaniemi – shit, I mean, University of Helsinki – station in Helsinki.

And to ramble on a bit more on the subject, I love how the Paris Métro embraces its history. Not only the iconic Art Nouveau entrances being retained, right down to the original signage, but also later designs being maintained in their original guise, rather than applying new-style signage on them whenever there's a design change. Helsinki for one could learn a great deal about this kind of respect for history.