Basileus Quartet () is a 1983 Italian film. It stars actor Gabriele Ferzetti.
The Basileus Quartet has performed together for over three decades at the cost of ignoring other aspects of life. When one of the group's members dies suddenly the others re-evaluate their lives. Later a young musician tries to get the group back together.
The film was nominated for Best Foreign Language Film of 1984 by the U.S. National Board of Review of Motion Pictures.
The New York Times, "Without ever forcing things, Basileus Quartet works so sweetly that, though it is completely conventional, it's almost exotic."