They moved a whole town Pattonsburg Mo not far from were i did lived because of floods. It was a deal very interesting .
In an earlier day buildings were mostly timber frames. They were always cut & fitted off site. I see them often with Roman numerals to identify where they were meant to go. Each piece was fitted individually. Depending on year, common sheathing was through & through sawed. Nails were used sparingly. A sheathing plank might have four tapered nails, might be 16" wide. A tapered nail, whether blacksmith made or cut from sheet only needed a bit of loosening, it came out freely.
Wierd bit of local history where I live: Mount Tabor was a mountain town. One edge of the town contained Otter Creek, a narrow valley, and the logical place to build Route 7, a major North South highway.
1840s the railroad was built. It was presumed that having a railroad & station would make an isolated town prosper. VT towns bought the land to build the track. Few of the town's residents expected to benefit from a railroad, they had a mountain to climb to get to the railroad.
There was a one time property tax of $5. Many didn't pay, some of them couldn't. Town took their property for failure to pay the tax.
Decades later, a rich kid from the next town had prospered from family money & railroad, bought 21000 acres from the Town for $1100. a little more than 5 cents an acre. There had been a couple hundred farms on this land. Countless buildings were knocked down, brought to the valley. To this day, several Danby homes came from "the mountain", countless barns still stand in the next town.