Opera Sauvage font here refers to the font used on the cover artwork of Opera Sauvage, which is an album by Greek composer and artist Vangelis, released in 1979 via Polydor Records.
The font used on the cover is probably Friz Quadrata originally designed by Swiss designer Ernst Friz for VGC in 1978. The font is a commercial one and you can view more details about it here.
Download Friz Quadrata Font
The Friz Quadrata font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.