July 4, 2016 Emma Meissner and Rosa Grünberg dance the “Boston” in 1909 Sweden 482 × 705 Rosa_Grunberg-1904 Rosa Grünberg, 1904. By Unknown photographer – Picture postcard, Public Domain, https://commons.wikimedia.org/w/index.php?curid=18401560 Rosa Grünberg, 1904