 A central theme in Burkhard's work was the depiction of the female sex, in an approach that has been interpreted as the "search for the primordial goddess, the focus of all desires".Women were notably the focus of a 1970s Polaroid nudes series with Markus Raetz, the theme of a noted series of photographs on the nape and feet of a geisha, and the topic of a number of huge images shown in 2008 in the "Songlines" exhibition at the Museum Franz Gertsch in Burgdorf.Burkhard and his work are the subject of an episode of the 2005 3sat documentary series "PHOTOsuisse".