With all of today's news of Batman's costume change and going back to the yellow oval, I started to trawl through some of my books to see when it all originally happened.

Back in 1964 sales for the Batman titles started to drop and Bob Kane even noted that DC were planning to kill off the character. At this time Julius Schwartz was assigned to the Batman titles. He presided over drastic changes, beginning with 1964's Detective Comics #327 (May 1964), which was cover-billed as the "New Look". Schwartz introduced changes designed to make Batman more contemporary, and to return him to more detective-oriented stories. He brought in artist Carmine Infantino to help overhaul the character.