Johann Martin Rubert
Johann Martin Rubert, also known as Rubbert or Rupert, was a German composer and organist.
In 1640 Rubert became the organist at the Nikolaikirche at Stralsund. He was a composer of part-songs, violin duets, and cantatas. Rubert was among the first composers to place non-dance movements at the head of what were considered dance suites.