Moving Large Objects

In November 1930, in Indiana, United States, one of the great feats of modern engineering was executed: a team of architects and engineers moved an 11,000-ton (22-million pound) telephone exchange without ever suspending its operations either basic supplies for the 600 employees who worked inside.

https://www.archdaily.com/973183/the-building-that-moved-how-did-they-move-an-11000-ton-telephone-exchange-without-suspending-its-operations

Neil Stephenson’s account of laying undersea telecommunications cable