The article presents a critical survey of the concept of Modernity, in relation with the ones of Postmodernity and Contemporaneity, while inserting this triad inside a more complex temporal matrix. Confronting, in particular, Martin Heidegger, the essay employs the categories of Modernity and Post-modernity in a synchronic way and faces specific points, such as the role of tecnique/technology and the meaning of progress as fundamental attributes of Modernity which today is read, above all, in terms of crisis.