 Paintings of shamrocks can be found in many of the engineering buildings, and the events celebrating National Engineers Week (U.S.) often have an Irish theme.The Loyal Knights of Old Trusty is a secret organization founded at the University of Oklahoma in 1920.That year a small group of engineers banded together and formed this secret order to uphold the traditions of the College of Engineering and to pay homage to the Patron Saint of Engineers, Saint Patrick.