Over its 75-year history, the American Ballet Theatre has been home to the lions of 20th century dance: Mikhail Baryshnikov, Gelsey Kirkland, Jerome Robbins, and George Balanchine all spent portions of their careers with the company. Today, its ballerinas still garner attention onstage and off—just look at current soloist Misty Copeland’s Under Armour commercial, which went viral earlier this summer. The Library of Congress explores the history of “America’s National Ballet Company ®” (so declared in a 2006 act of Congress) in the exhibition “American Ballet Theatre: Touring the Globe for 75 Years.” Dozens of works from the ABT collection, including photographs, scores, costume sketches, programs, and posters, make their way to the LOC to give dance fans a stronger grasp on the American Ballet Theater’s cultural significance. The exhibition divides ABT’s history into five sections, focusing on its founding, first years touring, new styles, diversity on the stage, and where the company will head in the future. With more than 50,000 archived items to sift through, visitors have time to study the company’s history before its next area performance. The exhibition is on view Mondays through Saturdays 8:30 a.m. to 5 p.m. to Jan. 24 at the Library of Congress James Madison Memorial Building, 101 Independence Ave. SE. Free. (202) 707-5000. loc.gov.