Michael Praetorius (probably February 15, 1571 – February 15, 1621) was a German composer, organist, and music theorist. He was one of the most versatile composers of his age, being particularly significant in the development of musical forms based on Protestant hymns, many of which reflect an effort to improve the relationship between Protestants and Catholics.

Praetorius was born Michael Schultze, the youngest son of a Lutheran pastor, in Creuzburg, in present-day Thuringia. After attending school in Torgau and Zerbst, he studied divinity and philosophy at the University of Frankfurt (Oder). He was fluent in a number of languages. After receiving his musical education, from 1587 he served as organist at the Marienkirche in Frankfurt. From 1592/3 he served at the court in Wolfenbüttel, under the employ of Henry Julius, Duke of Brunswick-Lüneburg. He served in the duke's State Orchestra, first as organist and later (from 1604) as Kapellmeister.