In Mitte, R.S.V.P. Papier lines a whole wall with fine papers sourced worldwide, alongside pens and artists' limited editions, while Frau Wunderwald - Vintage Möbel und Deko - Mid Century restores mid-century and Space Age furniture in a listed industrial hall. Kreuzberg's neunest, a women-led boutique, curates sustainable homeware. Shopping in Berlin, led by specialists.