The Harlem Renaissance was a cultural movement in the early 20th century where African American art, music, dance, and literature flourished. It began after World War 1 as many African Americans migrated north to cities like New York, settling in neighborhoods like Harlem. Notable writers included Langston Hughes and Zora Neale Hurston, while jazz musicians like Louis Armstrong and Duke Ellington gained popularity. The movement declined in the 1930s during the Great Depression as supporting organizations faced economic pressures.