1. The name comes from the shape of the original store at 34 Boulevard St. Germain in Paris. The windows to the street formed a diptych and the founders thought they were being clever, throwing in some extra letters.
2. When it opened, in 1961, it was a kind of bazaar, selling random products from across the globe. But it was the fabrics--crazy '60s prints on cotton--that finally put them on the map.
3. They'd paint the outside of the store a different color every week. It's fuschia now, the last color chosen by the three founders, Christiane Gautrot, Yves Coueslant and Desmond Knox-Leet.
4. Their first candles, thé, hawthorne and cinnamon launched in 1963, but their original eau de toilette, which launched in 1968, was based off a potpourri recipe from the 16th century.
5. They've finally launched e-commerce. (Ok, so you might know that one, but just in case you missed it.)