From the website:

This exhibition celebrates the artistic development and musical career of Marian Anderson. Renowned throughout the world for her extraordinary contralto voice, she is also remembered for her dignity and grace under pressure. Through the mechanism of recorded sound, we can continue to enjoy Ms. Anderson's renderings of Lieder and spirituals . Through the reflected light of photographs, we can glimpse the preparation and performance of her repertoire. And through the papers that she left behind, we can investigate and understand how, when, where, and with whom her life took shape, was enriched, and became enriching not only for her audiences but also for others in need.