Not many people work directly in the Reichstag (almost all offices and meeting rooms are located in adjacent buildings by different architects) but maybe I can

Not many people work directly in the Reichstag (almost all offices and meeting rooms are located in adjacent buildings by different architects) but maybe I can give some insight as I visited it often at my former job. It's the main building of the German federal parliament and a huge portion of the volume is just the plenary hall. The new Reichstag is one of the nicest buildings I now. It was originally constructed in the 19th century, burned down (the fire was used by Hitler as an excuse to consolidate power) and was left unused for many decades. Foster essentially fitted a modern building into the old one, something which I never saw anywhere else done so successfully. You feel the importance and history of the building at every corner no matter how often you have been there. On the other hand, it is very functional with short ways (if you know which turn to take which is not that obvious for the first few times). The building has rough edges here and there as a result of a too low public budget and a short-cut everybody uses goes through a service passage behind an uninviting door with naked walls and large visible pipes but that is all really minor (or rather part of the charm). Ten thousand members of the public visit the building daily and they are very present in many parts of the building without disturbing day-to-day work at all (as you usually don't cross their path while still seeing them – it's quite nicely done). The transparency just embodies the self-concept of the newly unified country.