Mona Lisa

The woman is wearing a modest black dress with a décolleté that is not adorned with any jewelry.

An excerpt from the article 38 facts about Mona Lisa
Behind the model, the artist painted a high wall and a melancholic landscape crisscrossed by path lines and meandering streams, different on the left than on the right. The landscape was entirely invented by the artist. One can see unusual rock formations, cliffs, a dried-up riverbed, lakes at various heights, a flowing river over which a bridge rises.  There are fragments of columns on both sides, probably painted at the end of the work's creation.