A chaconne (/ʃəˈkɒn/; French: [ʃakɔn]; Spanish: chacona; Italian: ciaccona, pronounced [tʃakˈkoːna]; earlier English: chacony) is a type of musical composition often used as a vehicle for variation on a repeated short harmonic progression, often involving a fairly short repetitive bass-line (ground bass) which offers a compositional outline for variation, decoration, figuration and melodic invention. In this it closely resembles the passacaglia. It originates and was particularly popular in the Baroque era; a large number of Chaconnes exist from the 17th- and 18th- centuries.