Nikolaus was the organist in the Marienkirche in Rostock from 1642 until 1671 when he retired. Chamber music, sacred tunes and body organ music had been the genres where he made up. “Delitiae musicae” keeps most of his chamber music including suites designed for study from the college students of Rostock University or college. Heinrich Muller edited the “Geistliche Seelen-Musik” that Hasse added some melodies. The making it through organ functions which Hasse made up are illustrative from the north German design. Hasse employed the usage of ornamentation in several major functions including his “Jesus Christus unser Heiland,” “Allein Gott in der Hoh sei Ehr,” and “Komm, Heiliger Geist, Herre Gott.” Embellishments had been used in a different way in each piece. In the previous, Hasse utilized the ornamentation in the guides as well as the pedals. In the next the dominant design is situated in the soprano and in the second option, the ornamentation continues to be within the soprano but the rest of the voices aswell, the exception becoming the pedals. Stylistically and visually Hasse could provide a unity to his compositions through counterpoint as well as the interrelationship he created via his motifs.