You should know about Alexander Sokurov's 2002 film "Russian Ark," a dazzling sprint through 400 years of Russian history, filmed in 33 halls and galleries of the Hermitage museum with a cast of 2,000. The entire 96 minutes is one long tracking shot, filmed with a Steadicam; there's not a cut nor an edit in its entire breathtaking length.
Another reader adds:
It covered acres of ground with a cast of hundreds, took months to prepare, and the museum gave the producers literally one chance and one day to shoot it. A 2-hour charge battery was invented to power the camera, one that could not be recharged. It was all or nothing.