Born to a family of the Roman intelligencia, Gallenga was interested in artistic pursuits from an early age and developed her method on printing (with carved wooden blocks and hand-painting) on textiles around the turn of the century. Influenced by medieval and renaissance patterns, her work is remarkably similar to that of Fortuny, who was working in Venice. Apparently there is no real connection. Gallenga managed her business, opening several retail stores and exhibiting clothing and other work at various expositions, while raising a family. Her husband was a physician and her studio was in their Umbrian villa. She was active in organizations of Italian artists and craftsmen and the international promotion of native work. She gradually turned more to interior decoration and died during WWII, unable to reach a hospital from her country estate.