Inc., the home was originally built as a private residence in 1859 by Pioneer Flour Mills founder Carl Hilmar Guenther.

Three years later, Guenther returned through Indianola, Texas, at the time a major entry port for German immigrants.

[8] He relocated southwest of Fredericksburg at Live Oak Creek, near the present site of Lady Bird Johnson Municipal Park,[9] and began constructing his dream of a gristmill.

Nevertheless, Guenther persevered and completed what would become known as Pioneer Flour Mills, a wheat and corn operation that served the area residents of Gillespie County.

He began construction of his vernacular native limestone home in the district at King William and Guenther streets.

An area of the house that once served as the library, is now the museum containing family keepsakes, as well as artifacts of milling, dining and baking history in San Antonio.