At the turn of the 20th century, few creative partnerships were as dazzling—or as influential—as that between Czech artist Alphonse Mucha (1860–1939) and legendary French actress Sarah Bernhardt (1844–1923). Together, they helped define the look and spirit of Art Nouveau, a movement that swept across Europe with its graceful lines, flowing forms, and celebration of beauty rooted in nature. Mucha’s Muses: Sarah Bernhardt and the Spirit of Art Nouveau highlights how Bernhardt, one of the most…