How Does This Staircase Not Collapse?

This staircase looks like it shouldn’t stand—but it does. Using a 700-year-old Catalan technique, thin bricks are carefully laid with mortar to form a self-supporting vault, creating a structure that is both lightweight and incredibly strong. #interesting #unique #interestingfacts

Credits: @manolo.canoo (ig)

Видео How Does This Staircase Not Collapse? канала Tech Amigos