Orasmus Cole/Celestine Kaltenbach House

This white brick house, saltbox style, was built in the 1840s by Orasmus Cole. The family of Celestine Kaltenbach, second postmaster at Potosi, lived in it for decades.

Masonic Lodge

Named for Dr. Joseph Warren, Grand Master of Massachusetts felled in the Revolutionary War at age 36, Territorial Wisconsin's Lodge #4 (preceded by Mineral Point, Platteville, & Milwaukee) was the first one chartered under the Grand Lodge of Wisconsin in 1844. The current building on this site was built in 1970, preceded by a 1916 temple higher on the hillside and the original one acquired from the International Order of Odd Fellows after Potosi Masons earlier met in a room above Coons' and Wooley's Store in Van Buren. Still in use, it met many years as a "moon lodge." Warren Chapter Order of Eastern Star #82 also meets in this building on the "first Friday on or before full moon."

Potosi Sawmill

The Potosi sawmill was run by a large engine located in its basement; but to meet the great demand for lumber harvested from the nearby hills, a steam engine was also added alongside the building. In the era of farm machinery, the site became Arno Keehner's and later Lavern Flesch's Implement shop. Today it houses Potosi Feed and Appliance.