A cornerstone is the first stone set in the construction of a masonry foundation. All other stones will be set in reference to this stone, thus determining the position of the entire structure.
Key Facts
| Subject | Cornerstone |
| Category | First stone set in construction of a masonry foundation |
| Reading time | 1 min · Intermediate |
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Reference material for this entry is drawn from the open encyclopedic record, including Wikipedia , available under the CC BY-SA 4.0 license. Images are credited individually beside each photo.