How did late Renaissance canzonas help lead to the development of the fugue?

Late Renaissance canzonas played a pivotal role in the evolution of the fugue by establishing the foundational principles of melodic imitation.12

The canzona, which originated as an instrumental arrangement of the French polyphonic chanson, relied on imitation as a primary structural technique. In the late 16th century, the keyboard canzona became increasingly focused on the intense, polyphonic treatment of a single theme, directly preparing the way for the fugue. In fact, in early 17th-century Germany, the terms were sometimes used synonymously.32

The logical ancestors of the fully developed fugue are specifically found in the closely imitative beginnings of late 16th-century ensemble canzonas, such as those composed by Giovanni Gabrieli. By utilizing imitation to unify musical structure, these works helped transition Western music from the rationalistic polyphony of the Renaissance toward the functional, subject-based contrapuntal textures that define the fugue.12