The announcement that Hollywood’s Cinerama Dome and ArcLight Cinemas would not reopen left Los Angeles film buffs in shock. Built as a showcase for the three-panel Cinerama process, the Dome became a Hollywood landmark and beloved theater. But by the time construction was finished in 1963, the three-panel Cinerama process was no longer in use. So the theater opened with the premiere of “It’s a Mad, Mad, Mad, Mad World” in regular widescreen projection with a slightly wider aspect ratio. Over the years, the Dome has been one of the top places in Los Angeles to see films in 70mm and a favorite spot for premieres and film festivals.