The Seattle Cinerama Theater, at the corner of Lenora and 4th Avenue, opened in 1963. Originally part of an elite group of theaters across the country, it is one of only three remaining Cinerama theaters. Built for the latest 70mm technology, the three projectors and 97-foot curved screen made it a premier destination for film makers and film lovers alike. Because the 70mm film is twice as large as 35mm film, the picture is bigger, brighter, and more vivid.
Source: https://queenannenews.com/news/2023/dec/20/seattle-reopens-a-cinematic-icon/