So I guess Michael Wesely holds the record for photos taken with the longest exposure…we’re talking years here, folks. This exposure documented the entire construction of the Museum of Modern Art (I’m not sure how exactly).

The photos contain the ghosts of the buildings as it is constructed; streaks
of the sun throughout the sky; and hundreds of little nicks, trails and
instances that elude to something happening during the long exposure.
The surrounding buildings stand solid and unchanged, a constant presence
in the otherwise changing environment.