[2] The cemetery was listed on the U.S. National Register of Historic Places in 2001.

John Chislett designed the original thirty-two-acre plot in the rural cemetery tradition.

The five-acre St. Mary's Cemetery was opened circa 1900 and was incorporated into the 1915 expansion.

[3] The cemetery contains two Commonwealth war graves of World War II, a flight engineer of Royal Air Force Ferry Command and a sapper of the Royal Canadian Engineers.

[4] Media related to Monongahela Cemetery at Wikimedia Commons