July 1859
| Location | Camp Floyd |
|---|---|
| State/Territory | Utah |
| County | Utah County |
| Modern Diocese | Salt Lake City |
| Historical Diocese | Diocese of Monterey(?) |
| Date | July 1859 |
| Priest | Fr. Bonaventure Keller, OFM |
| Religious Order | Order of Friars Minor (Franciscans) |
| Rite | Roman (Latin) Rite |
| Expedition | U.S. Army chaplain at Camp Floyd (Utah War-era garrison), not part of an exploration expedition |
| Confidence | confirmed |
Photos
Documentation
Notes
Fr. Bonaventure Keller of Philadelphia offered the first known mass in Utah in July 1859 at Camp Floyd. Keller was a U.S. Army chaplain, not an expedition member. Exact day within July 1859 not documented in any source found. Note: the more famous 1776 Dominguez-Escalante expedition crossed Utah and preached at Utah Lake, popularly commemorated with a monument cross, but no confirmed Mass from that expedition is documented.
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