Or if you like to have something modern, Paimio Sanatorium or Turning Torso.
I remember a major French pro-european politician (Modem party) attempting to define Europe (in the context of integrating Turkey), as "the friends of democracy". When you can't (or rather refuse to) define your identity, the only thing left to represent it is birds, office buildings and bridges. Notre Damme de Paris or the Pantheon in Rome are just old embarrassing historical artefacts of an evil civilisation.
The blandness comes from the fact that the EU has to tiptoe around the nationalists which will be upset that a country they don't like gets a banknote, and possibly even worse - they didn't get one.
Reading back both your and my post I guess it's the radicals of either stance who the EU desperately needs to cater to, resulting in generic designs. It's erasing itself like any institution with a 1-member veto.[1]