chapter 9 flying buttress: were diagonal arches that provided support to the structure. It became a major design feature on French cathedrals.
Notre Dame Cathedral: History and Interpretation
Barcelona’s natural wonder | National Geographic | Portfolio of the Week - Fernando Baptista - Visualoop:
The Ruined City of Dale in the Shadow of the Lonely Mountain
The Hobbit Activity Sheets | Dale - Lord of the Rings Wiki
The Hall of Durin-- Winner in Location category of "The Hobbit Design Contest"