it is arguable which sorority is actually the oldest, but Kappa Alpha Theta has the distinction of being the first fraternity known among women. it's actually a women's "fraternity." it is certainly one of the oldest, as it was founded in 1870. it is one of the better-known NPC sororities, and is certainly "exclusive" on many campuses, but the same could be said for other groups such as Kappa Kappa Gamma and Kappa Delta.
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