I'm seeking fictional locations for a historical novel set, in part, in Berlin. Here's the situation: The time is 1938, five years into the Third Reich but over a year before the outbreak of WWII. My character is a grand dame of Berlin society, the ageless, aristocratic widow of a Prussian general who hosts, in her large gloomy apartment, a weekly soiree that becomes a magnet for anti-Hitler military officers and other like-minded people, mostly from the traditional upper classes and the artistic and intellectual elite. My question: Where in Berlin, exactly, is this apartment? The family would have bought the place around the turn of the century, perhaps before. It would be in a district that was fashionable in Wilhelmine times, though it has perhaps declined since. I imagine a view -- perhaps of the Tiergarten, or someplace where the lady can watch young men in brown shirts carrying torches and acting like absolute idiots. I imagine her (or her aging house-"girl") closing the curtains in disgust, withdrawing into a private world of remembered glamour and elegance ... right in the heart of Hitler's capital. The ambiance here should be romantic, old-fashioned, perhaps shabbily genteel -- a relic of a bygone era that is still very much alive in my character's mind. Any suggestions are most welcome!