1956 Ford Thunderbird (24536709595).jpg|1956–1957 Ford Thunderbird "porthole" opera window in removable hardtop 1977-Matador Barcelona-opera window.JPG|1977
AMC Matador Barcelona coupe fixed opera window surrounded by padded Landau roof 1973 Dodge Charger SE opera windows.jpg|1973
Dodge Charger SE coupe fixed opera window behind the side door glass 1991 Cadillac Fleetwood gold-edition black vr.jpg|1991
Cadillac Brougham opera window as part of the rear door The design element of a distinct, fixed, centered opera window was borrowed from such windows in horse-drawn carriages and used during the classical era of automobile styling. For example, "the
Elcar in 1924 was good looking ... and even a fabric top in the style of a
brougham with oval opera windows framed by
landau bars". Opera windows saw their demise in the 1930s. Perhaps the most notable return was the "porthole" in the 1956–1957
Ford Thunderbird. It was provided as an option to improve rear-quarter visibility with the removable hardtop in place. "The hottest thing going was the 'porthole' window in the rear side pillar – called 'opera windows' – that came in during the horse and buggy [era]". Opera windows began reappearing in the early 1970s in such vehicles as the 1972
Continental Mark IV. Almost all
personal luxury cars would adopt opera windows, usually framed by a vinyl roof. Most often, opera window variants were applied on two-door
hardtop or
coupé models, spanning all types of vehicles from economy
compacts to
flagship personal luxury cars, in which latter exploding realm they became "recognition elements" seeking to add a vintage element to their styling. General Motors introduced an all-new line of mid-sized "Colonade" models for the 1973 model year. Standard on all the coupes was a fixed triangular rear quarter window while higher trim versions used a rectangular vertical opera window. In some cars, an additional feature was the so-called
opera light that was mounted on the outside of the B-pillar or C-pillar and illuminated when the exterior lights were switched on. ==Function==