What is the purpose of harmony theory in our time, what methods exist, and on which traditions does it build? This book does not aim to develop, discuss, or evaluate music theory. It is a comprehensive, practice-oriented textbook that provides an understanding of musical epochs and styles from the late Middle Ages to the present through illustrative audio examples. At its core is the cadence as a universal and fundamental harmony model that has been the basis and starting point of harmonic development for centuries. As a reference work for music or an extension of teaching repertoire, as an inspiration for style imitation or assistance in one's own composition, arrangement, or improvisation – the New Harmony Theory is the ideal guide for every advanced music lover, music teacher, orchestra and choir conductor, as well as church musicians.