Sly & The Family Stone: Harlem Cultural Festival '69

The Harlem Cultural Festival of that year, which would come to be known as “Black Woodstock,” had, on its surface, little in common with the upstate hootenanny. Held in Harlem at Mount Morris (what is now Marcus Garvey) Park, it was a self-consciously urban affair, a concert series rather than a one-off, and already in…