Phi Kappa Theta was established by the merger of two fraternities on April 29, 1959: Phi Kappa and Theta Kappa Phi. In 1889, Phi Kappa was founded by a group of Catholic students at Brown University who were refused entrance to other fraternities because of their faith. Later, on October 1, 1919, Theta Kappa Phi (an acronym for "The Catholic Fraternity") was founded by a similar group of students at Lehigh University in Pennsylvania. The merger of the two fraternities in 1959 was the first of its kind in the history of the American fraternal system. The merger between the two fraternities occurred at The Ohio State University with the first chartered chapter of Phi Kappa Theta located at Belmont Abbey College in North Carolina. Although rich in Catholic history, Phi Kappa Theta is open for membership to men of all faiths, and many of its members are not Catholic. Phi Kappa Theta is currently the only fraternity in the American Fraternal system that is considered a true "merger" of two separate Greek letter organizations. 

The ideals
Phi Kappa Theta is a national social fraternity founded on four ideals:

Fraternal: Duty to man
To provide the tangible and intangible aids necessary to establish a closely knit collegiate community whose members enjoy a mode of living that is conducive to the formation of gentlemen imbued with principles and ideals and to prepare them to contribute to the world community upon graduation.
Intellectual: Duty to self and parents
To remind our brothers that outstanding scholastic achievement is a primary personal responsibility, and to encourage a commitment to the university that provides each member with his intellectual formation.
Social: Duty to society
To encourage each member to identify himself with his collegiate and civic community by active participation and service, thus fostering a vigorous spirit of loyalty to Alma Mater and a selflessness to all men.
Spiritual: Duty towards God
To deepen the spiritual and enrich the temporal lives of its members through a well-balanced program of fraternal, intellectual, social and service activities.

National Flower: Red Tea Rose 

Colors: White, Gold, and Cardinal-Purple

Motto: "Give, expecting nothing thereof." (St. Thomas Aquinas, based on Luke 6:35: "do good and lend expecting nothing in return, for your reward will be great")

Wikipedia. 26 April 2010. Web. 1 Apr. 2010