This is an 18th Century Portrait of a Queen ,Nobile ,or Courtesan unsigned on the front.In good shape and reframed  securely in the 20th century.The frame measures 26 3/4"by 22 1/2".The portrait measures 22 3/4" by 18"There are a few black spots on the painting from unknown cause where the pastel paints seemed disturbed under a loop.

"In the eighteenth century, artists invariably used blue or gray papers because of the slightly coarse texture of such colored sheets. "

This looks to be a textured paper.

Slight chip on top of frame.