Frederick Daniel Wilhelmsen (May 18, 1923-May 21, 1996) was an American philosopher and professor in the Thomist tradition. Events 1152 - Henry II of England marries Eleanor of Aquitaine. Year 1923 ( MCMXXIII) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar. Events 878 - Syracuse Italy is captured by the Muslim sultan of Sicily. Year 1996 ( MCMXCVI) was a Leap year starting on Monday (link will display full 1996 Gregorian calendar) Philosophy is the study of general problems concerning matters such as existence knowledge truth beauty justice validity mind and language Thomism is the philosophical school that arose as a legacy of the work and thought of Thomas Aquinas. He also helped found Christendom College and taught at the University of Dallas for many years. Christendom College is a small Catholic Liberal arts college in Front Royal, Virginia, United States, in the scenic Shenandoah The University of Dallas is a private Catholic university located in Irving Texas.