The Altes Museum by Karl Friedrich Schinkel. Finished in 1830 the building was the height of Greek style architecture. (Thomas Gordon Smith refuses to use the term "Revival" in speaking of the style, and so do I) The building survived vicious fighting during WWII and survived the fate of the Communist regime after the war. The Royal Palace once stood on the same island in the Spree but was unceremoniously replaced with a hideous modernist block, (which is now being torn down to rebuild the Palace).
Well-lit in the Flickr pool
2 days ago