THE NEW ARTERIES' MILITARY PURPOSE

A DESIGN THE KINGS INVENTED TAKES ON A MILITARY ROLE 

The wide straight streets that lead to a symbol of royalty inspire  arteries that allow rapidly displacing troops. The symbol of royalty becomes a statue or edifice that strengthens the regime. 

The artery that leads to the distant 13th, which we will come back to.

Adapted from a Google map

Wide, those streets discouraged barricades. Long, they allowed bombarding them, since they sprang up all the same: 

Internet, source not said

          "Building a Barricade on March 19, 1871" (the day after La Commune began) by Arnaud Durbec / zoom. 

-- Musée Carnavalet, not exhibited

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This example comes from the south, where the government needed only tear down a slum. In the north, a steep hill prevented such transformation (more later).

In the east,

a canal complicated such change.

*    *     *

Next,
A "masterly line" cuts through the working-class east