Capoeira is an Afro-Brazilian art form that combines elements of martial arts, games, music, and dance. It was created in Brazil by slaves brought from Africa, especially from present day Angola some time after the 16th century. It was developed in the regions known as Bahia, Pernambuco and Rio de Janeiro. Participants form a roda, or circle, and take turns either playing musical instruments (such as the Berimbau), singing, or ritually sparring in pairs in the center of the circle. The sparring is marked by fluid acrobatic play, feints, and extensive use of sweeps, kicks, and headbutts. Less frequently used techniques include elbow strikes, slaps, punches, and body throws. Its origins and purpose are a matter of debate, with theories ranging from views of Capoeira as a uniquely Brazilian folk dance with improvised fighting movements to claims that it is a battle-ready fighting form directly descended from ancient African techniques.