French overture
The French overture is a musical form widely used in the Baroque period. Its basic formal division is into two parts, which are usually enclosed by double bars and repeat signs. They are complementary in style (slow in dotted rhythms and fast in fugal style), and the first ends with a half-cadence (i.e., on a dominant harmony) that requires an answering structure with a tonic ending. The second section often but not always ends with a brief recollection of the first, sometimes even repeating some of its melodic content.