My Architect (2003)

In A Son's Journey, Nathaniel Kahn examines the life and career of his father, Philadelphia architect Louis I. Kahn (1901-1974), whose work included the Salk Institute and the Parliament and Capitol Buildings in Dhaka, Bangladesh, before dying of a heart attack in a Penn Station bathroom in 1974, unidentified (it took three days before someone claimed his body) and broke despite having been one of the century's most influential architects.
Louis I. Kahn's obituary listed his survivors as a wife and daughter. But the list was incomplete because Louis I. Kahn also led three different personal lives, with three different families, fathering a daughter with his wife, and a child each by two other lovers.

The film was made by Louis Kahn's illegitimate son Nathaniel Kahn and features interviews with many giants of modern architecture.Throughout the film, Kahn visits all of his father's buildings. Thus, he pursues the object he wanted: by describing the obstacles and influences that shaped his father, he gains knowledge of a lost father.
Why should people watch this documentary? Because My Architect offers a fascinating insight into Kahn’s architecture and then into him as a man. Louis I. Kahn was a man obsessed by his work. His life was neither private nor public, but transcendent. He was a visionary man, whose aesthetics forced him beyond the dichotomy of public and private. And although Louis I. Kahn was already dead at the time of making the film, he is very much a presence in the film because his son was able to use documentary footage of his father from a series of films from the Museum of Modern Art. It’s a very satisfying, very informative documentary experience.
My Architect was nominated for the 2003 Academy Award for Documentary Feature.
You can buy My Architect: A Son's Journey.