Analysis of information sources in references of the Wikipedia article "Holy card" in English language version.
Of these one stands out as having deeply impressed itself of the American religious consciousness: the "Head of Christ" by artist Warner Sallman (1892-1968). Originally sketched in charcoal as a cover illustration for the Covenant Companion, the magazine of the Swedish Evangelical Mission Covenant of America denomination, and based on an image of Jesus in a painting by the French artist Leon Augustin Lhermitte, Sallman's "Head of Christ" was painted in 1940. In half a century, it had been produced more than five hundred million times in formats ranging from large-scale copies for use in churches to wallet-sized ones that individuals could carry with them at all times.
