Sigma Pi (ΣΠ) is an international college secret and social fraternity founded in 1897 at Vincennes University. Sigma Pi International fraternity currently has 127 chapters and 4 colonies in the United States and Canada and is headquartered in Brentwood, Tennessee. Like most social fraternities, membership is by invitation and limited to men, currently organization has initiated more than 95,000 men and has 6,000 undergraduate members.
The organization strives to build a brotherhood that raises the standards of morality and develops character in undergraduate males. Sigma Pi's ideals are to maintain an aristocracy of learning, diffuse culture, encourage chivalry, promote the spirit of civic righteousness and quicken the national conscience.