La prima notte di quiete (1972)
La prima notte di quiete, released in USA as Indian Summer is a 1972 Italian and French drama film directed by Valerio Zurlini. It is starred and produced by Alain Delon. In France and Germany it runs less than the Italian cut. It is known and available on DVD in France as Le Professeur (The Professor) and in Germany as Oktober in Rimini (October in Rimini).
More at Wikipedia.