People perform during the rose picking rituals in Kazanlak, Bulgaria, on June 6, 2021. The culmination of the 2021 Rose Festival was witnessed in Kazanlak this weekend. Kazanlak was known for its Rose Festival, which has been organized annually since 1903. The festival celebrates local residents' deep connection to the Rosa Damascena -- the Bulgarian oil-bearing rose -- for centuries. (Xinhua/Lin Hao)