1869-1924 - Original Koehnken & Grimm organ in the rear gallery of the Chapel. (Photograph from an archival source: University of Dayton Archives, submitted by Nicholas Koch/Nicholas Koch)
Note: Not extant. Not playable. (in this location)
2022-10-02 - This organ may have been given to Mount St. John in 1924 when the Wangerin Organ Was installed. However it is unclear whether the organ given to Mount St. John was the Koehnken & Grimm organ or a smaller French Choir organ that was previously installed in the Chapel. -Nicholas Koch
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