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A great deal of history and architecture in Mississippi and Louisiana has been lost, but they can rebuild it and preserve at least the former, if not the latter.
German cities were reconstructed to mirror their pre-allied bombing conditions, architecture, and city plans. When you stroll through Munich, the buildings just ooze Ye Olde Deutschland, and the Germans are proud that they were able to preserve, in a strange sort of way, their histories. This is also what the South must do.