1) It may showcase art films 
A cinematheque is a film archive with small cinemas that screens particularly classic and art-house films. == History == In 1935 Henri Langlois and Georges Franju founded a film club (`Cercle du cinéma`) to show old films from which originated the Cinémathèque Française in 1936. The idea to archive old films was by no means self-evident at t.....
a motion-picture theater, often part of a university or private archive, showing experimental or historically important films.