Heinrich Müller (18 October 1631 – 13/23 September 1675) was a German devotional author, Protestant writer of hymns, a Lutheran minister and theologian and a professor at the University of Rostock from 1647 to 1650. He famously denounced the font, the pulpit, the confessional, and the altar as "the four dumb idols of the Lutheran Church". He died in Rostock, aged 43. Source: Wikipedia (en)