In the book The Feathered Sun (World Wisdom, 1990), this painting is reproduced on page 161. It is titled “The Feathered Sun” and its date is given as 1964.
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.