César Baldaccini

Few artists' careers paralleled Fiedler's more closely than that of César Baldaccini (known just as "César"), a French sculptor born in 1921 of Italian parents from Tuscany in the working-class neighborhood of la Belle-de-Mai in Marseilles. César was born the same year as Fiedler and passed only three years prior to Fiedler. They shared a place in the Maeght stable of artists and their later careers were well documented by fellow Parisian art photographer Dan Kramer.

César Baldaccini at Wikipedia.org
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Wikipedia's brief biography of César's career as a renowned sculptor and painter is a good place to start.
César Baldaccini on Artsy.net
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"French sculptor César Baldaccini became known for his solid, welded sculptures of creatures and compressions of old vehicles and other junk material into tight packages."
César Baldaccini at Tate.org.uk
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U.K. based Tate.org has a selection of César's works and a brief biography at this link
César Baldaccini at Encyclopedia Brittanica
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A short bio of César with links to more info about the famous Parisian artist
'Le Pouce,' The Giant Thumb Sculpture
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An excellent article about César's 'Le Pouce,' The Giant Thumb Sculpture
César Forgeries Abound Shortly After his Passing
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The suspected counterfeiters appear to have exploited uncertainty over exactly how many works the prolific César had completed before his death.