sentences:  A chaconne is a musical form used as a vehicle for variation on a repeated short harmonic progression over a ground bass.The Chaconne was marked by the copyist, at the time of transcription, in the upper margin of the first page of the Dresden manuscript as "Parte del Tomaso Vitalino" (Tomaso Vitalino's part), who may or may not be Vitali.One striking feature of the "Vitali" Chaconne's style is the way it wildly changes key, reaching the far-flung territories of B-flat minor and E-flat minor, modulations uncharacteristic of the Baroque era, as change of key signature became typical only in Romanticism.