they represent is displayed through large-scale ceremonies which Aitamurto defines as "aesthetically lavish", vectors of a great deal of creativity. For instance, the end of winter is marked by burning straw images of Marzanna, the goddess of winter, while celebrating the victory of Yarilo, the god of the full swing of natural forces; the end of summer, instead, is marked by the burial of an image of Yarilo. Adherents of Slavic Native Faith often adopt elements from recorded folk culture, giving new meaning and purpose to Christianised or non-Pagan contents. Some Rodnover groups have appropriated or reappropriated Christian festivals. The same Kupala Night is a reappropriation, being the day of the year when Christian churches set the Nativity of Saint John the Baptist. The calendar of some Sylenkoite organisations includes holidays that have been de-Christianised, such as a "Christmas of Dazhboh's Light" and an "Easter of the Eternal Resurrection". Artistic and other pursuits A number of Rodnovers have expressed their religion through visual arts, with Svyatoslav I of Kiev being one of the most popular historical subjects among Rodnover artists. In the 2010s, Rodnovery entered the mass market culture of Slavic countries by promoting ethnic clothing, ethnic hairstyles, ethnic tattooing, by creating and disseminating its own systems of symbols and images, but also genres of music, cinema and fiction. Some Rodnovers espouse linguistic purism, proposing the replacement of foreign words with Slavic equivalents (such as svetopisi instead of fotografii, or izvedy instead of interv'iu). Rodnovery generally emphasises a healthy lifestyle of the individual, to be extended as a healthy lifestyle of the nation; restriction of food intake, avoidance of certain foods, and sport activities, timed to significant events or holidays, have acquired a ritual character for many Rodnover groups. A popular sport movement associated with Rodnovery is "Russian jogging" (Русские пробежки, Russkiye probezhki). Rodnover rituals and festivals often include martial arts displays; these sometimes symbolise seasonal change, such as the victory of spring over winter, or can be regarded as manifestations of bravery, strength, and honesty. "Slavic-hill wrestling" (Slavyano-goritskaya bor'ba) was established by the Russian Rodnover Aleksandr Belov. Other martial arts styles that are popular among Rodnovers are "bench wrestling" (lavochki) and "wall against wall" (stenka na stenku). History 1800s–1920s: Romantic and Russian revolutionary precursors The origins of Slavic Native Faith have been traced to the Romantic movement of late eighteenth and nineteenth-century Europe, which was a reaction against rationalism