Here is a 4-piece Metropolitan painting set that I recolored based on the mesh from SIMcredible Designs. The paintings are by artist "Andrea Laliberte", depicting women in four major cities - New York, Paris, London, and Rome.
 
The mesh for the paintings is from Simcredible Designs: http://sims2.simcredibledesigns.com/
 
The mesh will be found under "Downloads" - "Object Sets" - "Livings" - "Page 2" in the Santuario set. At the bottom of the page, you click on "Painting" to download only the painting mesh.