In August 1992, thirty-four commercial buildings in Mazomanie were placed on the National Register of Historic Places by the National Park Service. They represent nearly all of the old commercial portion of the village and give the district a distinctive nineteenth-century appearance. In 1993, a restoration effort began when the depot was renovated for use as a public library and historical research center. Most of the district's buildings are classified as Commercial Vernacular or Astylistic Utilitarian, with one boom town structure, one barn-like livery building, and one Italianate style structure. Thirteen buildings use cast iron supports in their facades. Many exteriors, though altered in some respect, remain remarkably intact, and some interiors still reveal much of their original construction and detail. The oldest structures are the stone-construction Lynch and Walker Flouring Mill and the frame-construction Milwaukee and Mississippi Railroad Depot, both dating from 1857. The most recent structure is the 1935 Mazomanie Community Building. The J.A. Schmitz building included a second-floor hall where plays, graduation exercises, and travelling shows were presented, and in 1882 the Ringling brothers from Baraboo gave the first performance of their Classic and Comic Concert Company there, a forerunner of their circus.