I n February, exceptional exhibitions are set to open across the globe. Some focus on titans of art history, like Picasso, Rembrandt, or Monet while others, like the Dallas Museum of Art's Berthe Morisot, Woman Impressionist or the inaugural Sotheby's Prize winner, Pop América, 1965-1975 at the Nasher Museum, shed light on artists less renowned. Above, preview this month's most anticipated exhibition openings.