What Is a Keystone in Masonry?

Keystone (architecture) - Wikipedia

Keystone (architecture) - Wikipedia

Seattle local business news and data - Construction - Keystone Masonry founder fuels his creative fire with stone sphere in Yelm

What Is a Keystone in Masonry?

Stone arch masonry showing ornate keystone Stock Photo - Alamy

Keystone Custom Masonry & Landscaping

Keystone (architecture) - Wikipedia

Keystone Masonry & Tuckpointing Chicagoland's Masonry & Brick Repair Experts

TIL That in masonry, a cornerstone is the very first stone set as a reference point for all other stones, while a keystone in an arch is the very last stone put