Chinese Architecture and Cities
First, read Great Blunders? The Great Wall of China, the Berlin Wall, and the Proposed United States/Mexico Border Fence, and watch the fourth video in this list: UNESCO/NHK Videos on Heritage. http://whc.unesco.org/en/list/438/video
Next, with the Great Wall of China in mind, discuss the multiple reasons and functions for the construction of such a massive project in relation to Chinese history, considering border walls in a general sense and their ultimate effectiveness.
Share your thoughts on the relevance of these considerations for the border wall with Mexico as proposed by President Trump.