An opera window is a small fixed window usually behind the rear side window of an automobile.[1] They are typically mounted in the C-pillar of some cars.[2] The design feature was popular during the 1970s and early 1980s and adopted by domestic U.S. manufacturers, most often with a vinyl roof.[2]
The origin was from "opera" vehicles of around 1915 with occasional collapsible seating for extra passengers.[3] The opera window was also a feature on "formal roof" and limousine models with higher than a normal roof to accommodate passengers with top hats.[3]