Phenomenology begins in the work of Edmund Husserl; the first of his phenomenological publications was the Logische Untersuchungen of 1901. It is rare that the beginning point of a philosophical movement can be identified with such precision. We must take advantage of this fortunate circumstance in order to better understand the phenomenological movement, for the notions of "origin" and "beginning" themselves play a key part in the development of the phenomenological teaching.