666 (The Apocalypse of John, 13/18) is a double album by psychedelic/progressive art rock group Aphrodite's Child. It is one of the early cult albums in rock history, and is still popular among fans today. It was released in 1972, and was the primary vehicle/effort for the Vangelis project. It had a minor Album Oriented Radio hit in "The Four Horsemen," and a nearly pop hit with "Break." The album was ostensibly an adaptation of Biblical passages from the book of the same name, but was also very experimental in lyrics and composition, including a curious piece of performance art in which Greek actress Irene Papas is struggling to chant a mantra while in the throes of hysteria and climax.
It wasn’t until the end of the 1920s that professional duo-piano teams became a regular part of the concert scene with the emergence of Bartlett and Robertson, followed by Vronsky and Babin a bit later, and finally, in 1936, Luboshutz and Nemenoff.