Bistritsa Babi (Bulgarian: Бистришките баби, "The Bistritsa Grannies") are an elderly/multi-generational women's choir carrying on the traditional dances and polyphonic singing of the Shopluk region of Bulgaria. Founded in 1939, the group won the European Folk Art Award in 1978, and it was declared a Masterpiece of the Intangible Heritage of Humanity in 2005. Performing three-part polyphony with features "retained from the pre-Christian times," the group has toured Europe and the US. They are known for their use of Shopi polyphony, costuming, dancing in a ring (horo), and performing the (the girls' springtime initiation ritual). In 2005 they were included in UNESCO List of Intangible Cultural Heritage elements in Eastern Europe.