I've just discovered this photographer in an article about his pictures of prostitutes in Paris.
Christer Strömholm (1918-2002), born in Stockholm, is a prominent figure in the history of Swedish photography. His pictures from the early fifties consist of sharply focused black and white compositions of walls, shadows and clear-cut interiors. While periodically living in Paris during the 1950s and 1960s he developed a style more in tune with street-photography and it was at this time that he made his famous portraits of transvestites and transsexuals at the Place Blanche. This particular oeuvre of work was massively progressive, documenting a marginalised group of society who did not fit into the social strata of Paris at the time.