Amos Bad Heart Bull (1869-1913) was an Oglala Lakota Sioux tribal historian and artist known for his pictographs.

Amos Bad Heart Bull was called "the Herodotus of his people" by Helen Blish, who rescued his 400 pictographs by having had them photographed before their interment. Through her intervention A Pictographic History of the Oglala Sioux was published to relate the transition of these proud Plains warriors into reservation Indians. The illustrations from this book have been featured in every television documentary about the Ghost Dance, the Battle of the Little Big Horn, and the deaths of Sitting Bull and Crazy Horse. The artist's pictures of Crazy Horse, his cousin, are the only surviving likenesses of him since Crazy Horse never allowed himself to be photographed. Fortunately, Blish was able to interview two of the artist's uncles, He Dog (Sunka Bloka) and Short Bull (Tatanka Ptecela), on the Pine Ridge...