Chronos is a 1985 film directed by Ron Fricke, created with custom-built time-lapse cameras. At 45 minutes long, Chronos has no actors or dialog. The soundtrack consists of a single continuous piece by composer Michael Stearns. Filmed in dozens of locations on five continents, the film relates to the concept of time passing on different scales. The bulk of the film covers the history of civilization, from pre-history to Egypt to Rome to Late Antiquity to the rise of Western Europe in the Middle Ages to the Renaissance to the modern era. It centers on European themes but not exclusively. Other time scales include the passing of seasons, and the passing of night and day, and the passing shadows of the sun in an afternoon to the passing of people on the street. These themes blend together with many symbolisms.