In the middle ages, stonemasons built large buildings, like cathedrals and castles, out of quarry stone. Quarry stone, or "free stone," was used so that it could be cut into ashlars, which were...
Masons construct buildings from "masonry." There are three kinds--brick masons work in brick, block masons in block and stone masons in stone. Laying brick is very similar to laying block, but it's...