Karl Martin Rheinthaler

Carl Martin Reinthaler (13 October 1822 – 13 February 1896) was a German organist, conductor and composer.

Alternative spellings include Karl Martin Reinthaler and Carl Martin Rheinthaler.

Reinthaler was born in Erfurt. He received his first music education from August Gottfried Ritter, an organist at Magdeburg cathedral. He studied theology, and then music with Adolf Bernhard Marx, studying from 1849 to 1852 in Paris and Rome with a royal scholarship.

He was associated with the Bremen Cathedral, of which he was director, chorus master of the Singakademie Bremen, and cathedral organist since 1857. A friend of Johannes Brahms, with whom he corresponded, he was responsible for the Bremen performance of A German Requiem. Reinthaler also conducted the premiere of the revised version of Max Bruch's first violin concerto in January 1868.

In later years, Reinthaler required a wheel chair, which limited his appearances in public musical scenes. He died in Bremen.