on march 17 and 1974 and a man be find dead in the toilet at manhattan penn station . although well know and he can not be identify because he scratch out the personal information in his passport and his body lay unclaimed at the city morgue for three day . it turn out to be the body of what many consider one of the great american architect of the twentieth century and louis i. kahn . he die at the age of 73 and on his way from india and where one of his great project and the institute for management in ahmedabad and be near completion . one of the most influential post war american architect and louis kahn architectural legacy include the house of parliament in dhaka and bangladesh and the kimbell art museum in forth worth and the yale art gallery and the salk institute in california and a kind of mobile music boat and design to give concert in harbour in various city around the world . while celebrate a an architect and very little be know about his private life . in addition to his wife esther and and their daughter and sue ann and kahn be survive by two mistress and harriet pattison and anne tyng and and their two child . all three family live within mile of each other in suburban philadelphia and but their path never cross until the funeral . his son and nathaniel and the director of this film and be only 11 year old at the time and and have only a few memory of his father weekly visit at harriet patterson and nathaniel mother and in philadelphia . twenty five year later and he set out on a journey to confront his father by visit kahn building and talk to relative and colleague and visit the place that play a role in louis kahn life . one of the most moving confrontation be when nathaniel ask his mother and a landscape architect and mistress of louis kahn and why she keep up with play second fiddle to his wife and never confront him with this . tear shed her eye and but she have no regret . it be worth it . it such an intensely sad moment . she obviously shatter and treat a an outcast at his funeral and which she be forbidden to attend and it almost a if she lead a substitute life . it all feel strangely unreal . another interview with edward bacon and kahn architectural nemesis and who be in charge of the rebuilding of his native philadelpia in the fifty and sixty and almost suffers a stroke on the spot and when he be remind of kahn unsavoury idea about architecture . his son and nathaniel and listen uncomfortably when a very senior bacon literally scream with anger whenever kahn name come up . the final scene be reserve for kahn grand creation and the capitol in dhaka and bangladesh . it take 23 year to complete and a vast and extraordinary building and of which the bangladeshi be extremely proud . it one of the very few national symbol with stature in this impoverished nation . some of the interview with the local bring tear in my eye and especially when they find out they be talk to god forbid the architect own son . the film be as much a personal journey a it be an account of kahn grand architectural legacy and be above all about the fruition of the film itself and film making in general . perhaps louis i. kahn falter a a father and but these shortcoming in his personal life make for an all the more interesting portrait in this extraordinary film . camera obscura positive .