Answer:
The Harlem Renaissance was the development of a neighbor hood specifically designed for African Americans.
These buildings where cheap and a lot of people wanted to full fill them, African American people migrated from all over the place to start a new and better life.
By 1920, some 300,000 African Americans from the South had moved north, and Harlem was one of the most popular destinations for these families.
(hoped this answered your question <3 <3 <3)