Today marks the 100th anniversary of the dedication of Wyoming’s first synagogue – Mt. Sinai in Cheyenne.
In October 1915, photographer Joseph Shimitz documented the dedication of Mount Sinai Synagogue, Wyoming first synagogue. The Mt. Sinai Congregation was incorporated in December 1910, and six years later a $20,000 [1] building was constructed at 1921 Pioneer Avenue.
This drawing of the completed Mt. Sinai Synagogue accompanied the newspaper coverage of the dedication ceremony.
(WSA Cheyenne State Leader, October 26, 1915)
Before the building was constructed an impressive dedication service was held on Sunday, October 24, 1915. The Cheyenne State Leader reported a large attendance at the ceremony. Among the speakers were Mayor Robert n. LaFontaine and former Governor Joseph M. Carey.
Senator Joseph M. Carey speaking at the dedication.
(WSA Meyers Neg 4342, photo by Shimitz)
The synagogue served the congregation for many years until 1951 when the present synagogue at 2610 Pioneer was constructed. A plaque marks the site of the first building, now part of the City and County Building.
The cornerstone for the synagogue.
(WSA Meyers Neg 4317, photo by Shimitz)
Interior of the Synagogue after completion.
(WSA Meyers Neg 1243, photo by Shimitz)
— Carl Hallberg, Reference Archivist
1. Accounting for inflation, the building would have cost over $460,000 today.
Wyoming Postscripts 
Very interesting. Next time I’m in Cheyenne I’ll have to look for it. I had no idea that there was a synagogue in Cheyenne of this age.
patholscher, unfortunately, the building itself no longer exists, but there is a plaque on the City and County Building block that marks the site. The current synagogue building was built in 1951 and is located at 26th and Pioneer.
Thanks!