the correct answer is Specifications.
The first stone laid during the construction of a masonry foundation is known as the cornerstone, foundation stone, or setting stone. This stone will serve as the reference point for all others, setting the overall structure's location.
A cornerstone eventually evolved into a ceremonial masonry stone, or replica, placed in a conspicuous spot on the exterior of a structure, with an inscription on the stone listing the building's construction dates as well as the names of the architect, builder, and other important people. In eastern architecture and generally in religious building, the cornerstone-laying ritual is a significant cultural element.
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