WAND-TV, November 6, 2017
Hieronymus Mueller moved to the United States in 1832. Through hard work and dedication, Mueller helped change the gas and water industry. Mueller was a German immigrant and an inventor and businessman.

Herald & Review, September 22, 2017

PBS, January 31, 2014
The Cross at the Crossroads in Effingham is seen by many, and we’ll share the story behind the big symbol. We’ll take you inside the Mueller Family museum in Decatur; started by German immigrant Hieronymus Mueller in the late 1800s, the Mueller Company became famous for fire hydrants, butterfly valves and much more.