Canon alla Duodecima in Contrapunto alla Quinta The "Canon at the Twelfth with Counterpoint at the Fifth" comes after the double/triple fugues and before the mirror fugues. Its subject is barely recognizable as a derivation of the Art of Fugue theme, and represents the cycle's most elaborate transformation. This canon is one of the best examples in music literature of double counterpoint at the twelfth. Please refer to the Canons of the Art of Fugue study for an analysis of this canon.