Re: Freud's neighbor #austria-czech
Those things can be check in the "Adoph Lehmann's allgemeiner Wohnungs-Anzeiger (Adoph Lehmann's general appartment directory) at https://www.digital.wienbibliothek.at/wbrobv/periodical/titleinfo/5311.
I checked 1908 (https://www.digital.wienbibliothek.at/wbrobv/periodical/titleinfo/229444), Volume 2 for you. Page 377 you find Max Gans-Schiller, however, it is not clear if this is the address of an appartment, his shop, or both. Anyway the address is Porzellangasse 16 which is 300m away from Berggasse 19 where Sigmund Freud lived. It could be that somebody mixed "near to the house of Dr. Freud" with "in the house of Dr. Freud. Or the given address was just the shop and the Glas-Schiller family did not want to make their private address public.
Alexander Burstein BA