Mapplethorpe took this iconic photograph of Philip Glass and Robert Wilson in the same year as the production of Glass?s landmark opera, `Einstein on the Beach,? which Wilson directed. The similar poses that the two men have adopted, as well as the geometry of the composition, emphasise their close collaboration ? as well as their differences. The walls behind them are not the same. The white wall behind Wilson stands a few inches in front of the coloured wall behind Glass. Whereas Glass is unkempt, quite scruffily dressed and holding his hands in a contorted fashion, Wilson is well-groomed and generally more self-composed.