How were building built using cornerstones?

Buildings were traditionally constructed using cornerstones as a foundational element, marking the precise location and alignment of the structure. The cornerstone, often set at the building's most prominent corner, symbolized stability and served as a reference point for laying out the rest of the structure. It was typically inscribed with the date of construction and other significant details. Additionally, cornerstones were believed to bring good fortune and protection to the building and its inhabitants.