 That era’s proliferation of heavy, typically vinyl-covered C—pillars opened the door to frantic copycatting that ended up permanently blurring the distinction between traditional opera windows, which still are found, and rear quarter windows, rear door vent windows, sharply raked fastback and hatchback rear windows, wraparound windows, and other established rear window design trends and treatments.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.