This painting by Frithjof Schuon is reproduced on page 21 of Images of Primordial and Mystic Beauty (Abodes, 1992). A Plains Indian warrior (on the left) and two chiefs are represented in front of what may be the side of a tepee with its various symbols and images. The original painting is from 1960 and is 9 by 13 inches.
Christentum – Islam: Ausblicke auf eine esoterisch Ökumene (e-Book)
In this work, Frithjof Schuon compares Christianity and Islam and also looks at confessions within these world religions: Protestantism, Orthodoxy, and Shiism.