Built by the McCornack Oil Company in 1928, this Tudor style building stands where Ira Minard's home once stood. Architect Frank Gray designed the building.

Charles S. McCornack established the company in 1904, when he bought an independent oil business from Henry Delno. The company started out with only ten oil tanks, four horses, and a few sleighs, but their delivery of kerosene to homes and businesses grew to include the expanse of the Fox Valley. In 1911, the company bought its first truck, and also began to supply customers with gasoline to run their own automobiles. At this time, the company supplied Red Hot gasoline and Excelene motor oil.

By 1920, demand became great enough to warrant construction of its first gas station on West Main Street, where the Filling Station Restaurant now stands. In 1928, McCornack established his second gas station in this building. An article in the St. Charles Chronicle boasted that the new station would have its own grease pits--which, as the article claimed, were able to thaw out frozen radiators in winter.

Today, the building serves as the location of the St. Charles History Museum.(Read more on the St. Charles Library website)