An instrumental introduction to an opera, ballet or suite, combining a slow opening, marked by stately dotted rhythms and suspensions, with a lively fugal second section. There is often a return to the style of the opening at the end of the fast section. The form originated with Lully's ballet overtures of the 1650s and flourished for over 60 years in France and even longer elsewhere. Handel used it for his London operas and oratorios and Bach in his orchestral suites and other works.




