Jacob Praetorius (c. 1586 – 1651) was a German composer and organist of the late Renaissance and early Baroque periods, known primarily for his contributions to sacred choral music and organ compositions. He was the son of composer and organist Michael Praetorius and was active in the region of Hamburg. Praetorius's genre primarily encompasses sacred music, particularly chorales, motets, and hymns. Some of his notable works include "Ein feste Burg ist unser Gott," a choral setting of Martin Luther's hymn, and several collections of motets that display intricate polyphony and rich harmonic textures. His impact on music is significant, as he bridged the transition between Renaissance polyphony and the emerging Baroque style. Praetorius's work influenced the development of Lutheran church music, and his compositions helped to popularize the use of chorales in worship settings. His legacy is also reflected in the continued performance and study of his choral works, which are appreciated for their musical complexity and spiritual depth.