On the one hand, it is planned to give a thorough presentation of the basic notions of Differential Geometry: metric tensor, Riemann curvature tensor, fundamental forms of a surface, covariant derivatives, fundamental theorem of surface theory, etc. This field is indeed often considered as a "classical" one, but it has been recently "rejuvenated", thanks to the manifold applications where it plays an essential role. Some of these applications will be studied in the School, such as: