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Wiertz, Henri Louis (Joub) Wiertz; born Amsterdam on August 7, 1893 and died Hardenberg December 9, 1966. Lived and worked in Amsterdam, Laren(NH), Groningen, Assen, Hilversum; since 1949 in Ommen. Traveled a lot: Africa, South America, China, Russia, Australia. Advice from the Belgian painter VE van Uytvanck, student of Prof. Willemse in Dendermonde. Originally an engineering education. Architect and painter. Paints, watercolors and draws in an expressionist style on all subjects, mainly landscapes. Known for its colourfast cement technique. Graphic work (lithographs and wood engravings), special study of heraldry with T. van der Laars. Charters, etc. Gave lessons to JFvan den Berg and S. Mantel. Was a member of "The Independents" in Amsterdam for many years."