The organ in the chapel at Schloss Wilhelmsburg in Schmalkalden, Thuringia, Germany, was built by organ builder Daniel Meyer from Göttingen between 1587 and 1589 and consecrated in 1590. Over the centuries, the organ underwent significant modifications. Between 1968 and 1976, it was restored to its original state by Orgelbau Wilhelm Rühle & Sohn (Moritzburg) based on historical documents from the original construction contract dated December 22, 1586. Approximately 40% of the original pipework remained intact.

The organ features a three-part Renaissance facade with painted wing doors. The entire pipework is made of wood, and the facade pipes (Principal 4') are covered with ivory plates, carved from a single piece and gilded around the lips. Initially, a "double-stringed instrument" (harpsichord) was integrated. The organ can be closed with doors displaying an iconographic program, depicting heavenly music with various instruments like cornetts, lutes, horns, triangles, violins, harps, serpents, and violas.

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