In the past, Charles Joseph Frederic Soulacroix's work has often been confused with that of his son, Frédéric Soulacroix (1858-1933). According to Frédéric's great-grandson, Conte Dr. Gregorio d'Ottaviano Chiramonti, Frédéric always signed his work F. Soulacroix, while Charles, who was a religious fresco painter and sculptor, signed his work C. or CH. Soulacroix.

However, many auction houses continue to assign works signed F. Soulacroix to his father Charles.
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