The Getty Images Archive has posted a large collection of images of the African disapora for free non-profit use. You can learn more at:
From the press release:
" Getty Images, a preeminent global visual content creator and marketplace, today launched the Black History & Culture Collection (BHCC), an initiative created to provide free non-commercial access to historical and cultural images of the African/Black Diaspora in the US and UK from the 19th century to present day. The collection aims to grant access to rarely seen images for educators, academics, researchers, and content creators, enabling them to tell untold stories around Black culture.'
Thanks to H-Histbibl for this tip.