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Johannes Mattheus Graadt van Roggen (Amsterdam, 28 May 1867 – Alkmaar, 26 August 1959) was a Dutch draughtsman, painter and graphic artist. He is considered a forerunner of the Bergen School. He is also called Job Graadt van Roggen and was the second son of Jacob Frans Graadt van Roggen and Catharina Petronella Margaretha Zembsch.
He first gained fame as an etcher. He made reproduction etchings after the Hague School. Since he lived in Bergen he increasingly started painting and watercoloring. Because of his deafness Graadt van Roggen was a visually oriented painter par excellence, who painted what he saw. He was also a real plein air painter; he liked to paint outdoors. He rarely or never painted indoors - there are a few still lifes and portraits. He always worked figuratively. Graadt van Roggen usually found his subjects near his home town of Bergen. He made many dune landscapes (from Bergen aan Zee to Camperduin and Petten); he also regularly painted the Zeeland coast. Other subjects include: harbors, portraits and cityscapes. Graadt van Roggen has often been abroad.