German photographer Michael Wesely is known for his work using long exposures and pinhole cameras. In 2001, he was invited to record the exterior renovation of the Museum of Modern Art in New York City. He set up four different cameras on four different corners and left the shutters open for 34 months.
I really love the way these photos capture the passage of time. The areas of the building which weren’t altered appear perfectly clear and focused, while the areas that were changed have a ghostly quality from the superimposition of the images of the old, new and transient perspectives.
In the sky, you can see the trace the sun left behind as it moved through the sky throughout the day. It gives a record of which days were sunny and which days were cloudy, as well. The picture below was made by Michael over two years during the renovation of the Potsdamer Platz in Berlin.