Domes

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Across
  1. 2. Iron rings built around the dome to prevent it from collapsing
  2. 4. Famous type of geodesic dome in Disney World!
  3. 6. A hole at the top of the Pantheon that allowed light in
  4. 8. First type of dome made from a rotated arch
  5. 9. This famous U.S. dome made of 2 domes with cast iron ribs
Down
  1. 1. Modern type of dome made with this type of roof
  2. 3. This revolutionary type of dome made of a series of triangles
  3. 5. Ancient buildings were made with these but left little interior space
  4. 7. Architect who designed spaces between the arches to lighten the dome