The organ of the Grasberg church, or Findorffkirche, in Grasberg was built in 1693–1694 by Arp Schnitger, originally for the orphanage at Rödingsmarkt in Hamburg, and transferred to Grasberg in 1788. It is one of the few instruments by Schnitger to have been structurally changed as early as the 18th century. The organ has 21 stops, over two manuals and pedal. 15 stops are still original Schnitger work.