Ivory Tower

One of the Futurian Houses located on Bedford Avenue, Brooklyn; so called from the color of its walls. It was the most famous of the Futurians' science-fiction houses, being inhabited by Lowndes, Michel, and DW3 all thru 1940.

from Fancyclopedia 1 ca. 1944
Apt 4C, 2574 Bedford Ave, Brooklyn NY. So called from the color of its walls. It was inhabited by sundry Futurians, notably Lowndes, Michel, and DW3 [three is superscript], all thru 1940, following their loss of Futurian House. It was the most famous of the Futurians' science fiction houses. When the lease expired, Wollheim went back to his family home, Wilson to Raven's Roost, the remnant Futurian Embassy.