Michael Praetorius
Michael Praetorius (born Creuzburg an der Werra, near Eisenach 15 February 1571? ; died Wolfenbüttel, 15 February 1621) was a German composer, organist and music theorist. He was one of the most important composers of his day and he wrote lots of different kinds of music. A lot of his music is based on hymns of the Protestant church.