The art world lost a legend today. William Klein passed away at the age of 96. He was one of my favourite photographers. Early in my career I had the pleasure (and terror) of working with him. That experience has remained with me ever since. Klein was truly one of the greats and one of the most influential photographers of the 20th century. Despite having no formal training as a photographer, Klein won the Prix Nadar in 1957 for New York, a book of photographs taken in 1954 (one of the greatest photo books ever published alongside Robert Frank’s ‘The Americans’). Klein was a revolutionary, he rejected all prevailing rules of photography and had an almost dismissive and ambivalent approach to fashion. He, nonetheless, invented a new way of seeing with his extensive use of wide-angle and telephoto lenses, he also invented the open flash technique. As an outsider and a rebel he did as he pleased and we are the better for it. The New York Times' Katherine Knorr writes that, along with Robert Frank, Klein is considered "among the fathers of street photography, one of those mixed compliments that classifies a man who is hard to classify." RIP Mr. Klein.