For the Louvre's structure, which part of it is the west wing?

Question

Here is a map to help you answer my question. I am researching the Louvre and it says that Pierre Lescot built the west wing, but I am unsure which part of the Louvre that is.

use this map: http://upload.wikimedia.org/wikipedia/commons/6/6a/Louvre.png

Answer 1

The western part does not exist anymore - It has been destroyed in 1871, at the time of the Commune Revolution

It was the Residence of the king before the construction of Versailles and this from Philippe Auguste at the middle ages -

After 1871 it was partly the location of the Ministery of Budget

and partly a huge Museum - Budget left the place which still enabled to enlarge the Museum

Answer 2

"The Louvre" is a district of Paris, not a museum.  It has no west wing.  Maybe the museum there once did.