Released on this day in 1973, The Dark Side of the Moon is the eighth studio album by Pink Floyd. It topped the Billboard Top LPs & Tapes chart for a week and remained in the chart for 741 weeks from 1973 to 1988. With an estimated 45 million copies sold, it is Pink Floyd's most successful album and one of the best-selling worldwide. It is also one of the greatest albums of all time.
In honor of the anniversary, check out a documentary about the making of this landmark album, above.