Anna-Teresa Tymieniecka had great influence on the spread of phenomenology in the United States of America. Through teaching, editing, organizational activity, and extensive networking, Tymieniecka worked tirelessly to develop this philosophical current. She went beyond the thought of Edmund Husserl, the father of phenomenology, and of Roman Ingarden, one of Husserl’s most important students and her teacher, to elaborate a personal perspective. That phenomenology flourishes as much as it does in United States of America owes much to her efforts. Her dedication to developing phenomenology, both theoretically and in the public consciousness, was unwavering. Her multiple contributions in teaching, organization activities, publishing, and writing have not gone unnoticed. They are recognized not only in the American academic world, but also all over the world. Her death leaves a real void in the professional philosophical world. For her theoretical innovations, her support of historical research, and her multiple teaching, publishing, organization-forming, and networking activities, Anna-Teresa Tymieniecka is one of the most important philosophers the phenomenological movement has produced. Any account of the history of the reception of phenomenology in America would be incomplete without detailing her contribution. This essayist is greatly indebted to her and hopes this effort will be the first of several future historical explorations.