The second example is something most of us probably know already, the new wing of the Reich Chancellery, The Neu Reichskanzlei in Berlin, Germany by Albert Speer, is a highly lavish and very effective concept of governmental architecture.
One day Adolf told Albert he wanted a new wing of the chancellery because the old place was not very good for the party's activities, which were plenty in terms of organization, along with personal headquarters and secretly a future bunker area, he gave the entire side street, by that point with the old stables and services areas demolished just for him, and a pack of official budget orders to do whatever he needed, the catch was he needed that within a year. Speer gladly accepted but in secret the dude would go on to sleep little in his passion to deliver, and he did in grand fashion.
Taking his own refined skills in Stripped Classicism (also called Clean Classicism) he started conceptualizing the needs: Sturdy and well-built, grand and holding the culture/reich's ideals. The most apparent thing is the decoration but like in all these new trends in architecture, ornamentation came with innate texture instead of man-made ones (Speer clearly understood Adolf Loos' writings) and even went a step ahead in reducing costs of the same, but more on that later because the real protagonist was another one.
Albert ran a system in which he created a route to see the Fuhrer, if someone had a meeting with him or simply wanted to see him the route should be a psychological ritual, and if we judge by pictures Speer did a great job, the trip itself is extremely intimidating, especially if said visitor was a rural person not used to such dimensions in building. I was going to write the route from what i remembered in a book but i found an excellent text from Speer pin-pointing the journey:
From Wilhelmsplatz an arriving diplomat drove through great gates and walk later into a court of honour. By way of an outside staircase he first entered a medium-sized reception room from which double doors over 5 meters high opened into a large hall clad in mosaic. He then ascended several steps, passed through a round room with domed ceiling, and saw before him a gallery 150 m long. Hitler was particularly impressed by my gallery because it was twice as long as the Hall of Mirrors at Versailles. Hitler was delighted: "On the long walk from the entrance to the reception hall they'll get a taste of the power and grandeur of the German Reich!." The series of rooms comprising the approach to Hitler's reception gallery were decorated with a rich variety of materials and colours and totalled 221 m in length.
Clearly Adolf knew the concept, before they even reached him they would already be intimidated and in an inferior position, it's after all a long walk through absurd reception halls and security checkpoints, both densely texturized, to then reach a gallery full of high-ranking members and soldiers, after walking and seeing/hearing all the people at the disposal of the Fuhrer you reach a very tall secretary reception to finally walk in into the man's office. Adolf seems to have requested Speer reunions just to gaze into the plans and say nothing as the architect mentioned he let him do anything as he was already impressed.
The place was finished 2 days in advance and won Albert Speer any kind of recognition for being a good planner, hence why he got high-ranking places in the war. Costs were high but still under the expectation, an example was the marble halls and decorations, our dude here used limestone cut with high duration saws (something normal nowadays but back then unusual) and then had them be polished hard until they reached a very strong color. The process was very long but still reduced costs very highly if otherwise marble was used, also construction was quick because check the ceilings:
Stripped Classicism, even as the name states otherwise, uses many modern techniques or old ones rarely used but effective in large scale/mass area constructions because it was "modulated" or done in "cast" units. In the case of the ceilings/roofing these were done with a functionalist grid design, something very rationalist and german in those days due to the Bauhaus/Werkbund newly-found legacy, and build with reinforced concrete (re-bar skeleton with concrete) making it by de-facto a brutalist building. Thing is, even when its current iteration was made around those years in Germany, that kind of construction appeared in old Rome (sans steel elements), one primary example is the all-famous Roman Pantheum, showcasing a giant cement/high-density concrete dome in square grid... little less than 2000 years ago, and the Reichskanzlei reminisces of it in the Ocular room serving as checkpoint from the Mosaic Hall and the Marble Gallery, although without using the dome's form itself as weight support.
Mind you this is just a part, sadly after the war the allies did a mess and the entire thing got demolished, but it took its time and proved Speer as class having withstood the entire bombing without c