In this course students will deepen their knowledge of music theory. We will learn and practice advanced harmony and form in tonal music as well as selected topic of 20th century music theory and practice. We will start from chromatic harmony of the late 19. Century and go through instances of atonal, serial music up to special 20th century composition techniques and forms. Emphasis will be put on assignments and exercises in order to develop good creative and analytical skills. We will examine the main formal principles of post-tonal music and apply our knowledge in analysis of selected compositions. We will use various analytical approaches and test them on a large scale of musical material. Every student will be due to realize at least one analysis of assigned composition during the semester.