The Pompidou Center, but Piano and Rogers in Paris came to mind immediately.
"Their concept, depicted in one of their competition drawings as a collage, was portraying the museum itself as movement. The other concept in their design, and perhaps the most obvious, was exposing all of the infrastructure of the building. The skeleton itself engulfs the building from its exterior, showing all of the different mechanical and structure systems not only so that they could be understood but also to maximize the interior space without interruptions." - ArchDaily.com
I found it particularly interesting to discover their usage of collage for the design submission.
So function can be portrayed through symbolic representation. The center was designed to embody movement and freedom - both with strong political affiliations.
The second example that came to mind was Saarinen's TWA Terminal. The function of the building is clearly represented on the exterior.
Investigating functional symbolism also brought to mind national and political symbolism.
