Craftworker, painter, printmaker and teacher, born in Neuenburg, Germany, who studied in Paris, Munich and in Berlin like his wife Adèle Reifenberg, whom he married in 1930. Because the Nazis forbade him to paint, Rosenbaum had to teach crafts in Jewish schools until he and his wife left for London in 1939. There he restored houses and porcelain, was able to resume serious painting and with his wife ran a private art school from 1948 until his death, in The Hague, Netherlands. Ben Uri Art Society holds several examples, having given Rosenbaum shows in 1957 and 1968.