An undergorund car park rue Mazarine hides on its frist and second undergorund levels some quite big peices of the rampart. The geological level is near the river Seine about 7 meters under its present level. It gradually went up to the level of the Bld St Germain which is approximately at the natural level.

That's why the car pak situated hal way between the Seine and the boulevard St Germain includes the remnants of the wall in its undergorund part.

The above picture is taken from the first underground level, that is the higher part of the wall.

First underground level. This shows the view down to the second underground level where is the base of the wall. At the end, the beginning of a tower

2nd underground level. View form the base of the the tower and its foundation. That building was buried under under a few dozens of centimeters of earth