Wolfgang Georg Fischer was born in Vienna in 1933. In 1938, after the Nazi occupation of Austria, he emigrated with his family to Yugoslavia. His father escaped to England but in 1940 Wolfgang Fischer was forced to return with his mother to Vienna, where he spent the war and attended school and university. He studied art history in Vienna, Freiburg and Paris, before taking up a research fellowship at Harvard University and teaching at Smith College. In 1963 Dr. Fischer moved to London and joined the Marlborough Fine Art Gallery, of which his father was a co-founder. He worked as a director of Marlborough Fine Art until 1971; the next year he and his father opened Fischer Fine Art.
Wolfgang Fischer's first work of fiction, Interiors, won the 1970 Charles Veillon Prize for the best German novel of that year. It was published in England by Peter Owen in 1971 and has also been translated into French and Polish.
In non-fiction, Fischer is a world-renowned expert on Egon Schiele and his contemporaries. Since first exhibiting the Schiele in 1964, he devoted his attention to classical Viennese Modernism, chiefly Schiele, Kokoschka, and Klimt, regularly showing their works at his London gallery, Fischer Fine Art, and contributing with numerous publications to the art-historical literature. He also contributed to the catalogue raisonne of Schiele's work and has written a monograph on Klimt's partner, fashion designer Emilie Floge.