Viola bastarda refers to a highly virtuosic style of composition or extemporaneous performance, as well as to the altered viols created to maximize players' ability to play in this style. In the viola bastarda style, a polyphonic composition is reduced to a single line, while maintaining the same range as the original, and adding divisions, improvisations, and new counterpoint. The style flourished in Italy in the late 16th and early 17th centuries. Francesco Rognoni, a prominent composer of divisions, stated that although works using the bastarda techniques could be played by a number of instruments, including organ, lute, and harp, the "queen" of bastarda technique was the viol because of its agility and large range.