Gregory Gerrer, OSB (July 23, 1867 – August 24, 1946) was a Benedictine Priest at Sacred Heart Abbey (later, St. Gregory's Abbey), artist, art historian and museum founder.

Pius said that he choose it because the artist painted him true to life and did not minimize his facial warts.

Gerrer also painted portraits of two World War I Choctaw code talkers: Otis Leader and Joseph Oklahombi.

[3] The largest collection of his paintings is at the Mabee-Gerrer Museum of Art in Shawnee, Oklahoma.

The University of Notre Dame conferred an honorary Doctor of Laws degree to Gerrer.