California State Historical Landmark #627
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This landmark is located at 35 Napa and 1st Street West, Sonoma, California. There are 26 other California State Historical Landmarks in Sonoma County. The GPS coordinates for this location are N 38° 17.514 W 122° 27.523.
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The original hotel was a one-story adobe, the adjoining hall was a one-story frame structure. After the fire of 1866, a two-story stone hotel and a two-story frame hall with rooms upstairs for hotel guests were built. The Union Hotel was conducted as a hotel until 1955, when the Bank of America acquired the property.