Nostalgia

A Russian poet and his interpreter travel to Italy researching the life of an 18th-century composer, and instead meet a ruminative madman who tells the poet how the world may be saved.

Nostalgia is a 1992 drama movie directed by Andrei Tarkovsky, starring Oleg Yankovskiy, Domiziana Giordano, Erland Josephson. It holds an IMDb rating of 7.9/10 from 33,191 votes and runs 2h 5m.