For centuries, the art world and art market were dominated by men—just look at Giorgio Vasari’sThe Lives of the Artists, or, more recently, Jonathan Jones’s all-male list of the greatest artworks ever—but that’s beginning to change. Women now occupy top positions in every sector of the art world, and though they are still paid less than their male colleagues in similar roles, they are slowly helping to right the industry’s historic gender imbalance. Herewith, artnet News recognizes the invaluable work of 25 art world power players who are women.