David and Zack get a chance to weigh in on Tom’s interview with Joe Alonso from Episode 25, regarding masonry and the Washington National Cathedral.

SEE: Washington National Cathedral (WNC)

SEE: WNC Slides—Tour & Earthquake

SEE: Tallest Buildings in Washington, D.C.

SEE: Architect

SEE: Structural engineer

SEE: Stonemasonry

SEE: Igneous, sedimentary, and metamorphic rock

SEE: Stone carving

SEE: Russell Sage Memorial Chapel

Tom shares that the construction of Notre-Dame’s main crossing vault is underway.

SEE: Wooden centering for main crossing vault at Notre-Dame—NBC Today