From medieval France to present-day America, learn about the work and design that goes into these massive, Gothic structures, from the enormous buttresses to the towering gargoyles to the delicate stained glass windows. Explore the construction and engineering behind these religious monuments and see how little has changed over the past thousand years. Follow the progress of Washington's National Cathedral, the early planning stages as well as the final construction of the cathedral that is larger than Notre Dame and Chartres.