U.S. History Interactive Maps In this interactive, maps provide an overview of key themes in U.S. history, and are built on a series of bookmarks with markers highlighting events and people that illustrate the theme, along with map layers that provide additional information. Educators and students can customize maps by adding bookmarks, markers, and information and save them as their own.
Which Famous Cathedral Collapsed?
Four of the grandest medieval cathedrals are shown -
one of which was not structurally sound and collapsed.
After looking at the photos try to select which cathedral
fell and see if you can determine, from the picture, why
it might have happened.