At the beginning of 20th century, large masses of black people were migrating to northern states or between districts of the same towns (like in New York from Tenderloin or San Juan Hill to Harlem, previously occupied by Italians and Jews) because of lower real estate prices, economic crashes, and worsening of conditions for blacks elsewhere, including anti-black riots. Several black real-estate entrepreneurs like Phillip Payton Jr took big part in the organization of such moves.
I wonder if it had any reflexion in the architecture of such districts, except for the probably thriftier use of ornaments, which I believe would clearly result from the low price of the newly created buildings.
I compare it for example to Jewish settlements in Europe or the United States, where their own culture was strongly reflected in local architecture. But while there were plenty of Jewish architects with proper education and a unique style that developed through centuries, with its own symbolism, I'm not aware of anything like that in Black American culture, except for so called shotgun houses.
How did settlements of Black Americans affect the local architecture? Was there anything like a Black American architectural style or symbolism at the beginning of 20th century or later?