Theta Xi fraternity is founded at Rensselaer Polytechnic Institute

Theta Xi (ΘΞ) is a North American Greek-letter social college fraternity. It was founded at Rensselaer Polytechnic Institute in 1864. Of all the social fraternities today, Theta Xi was the only one founded during the Civil War. Its Grand Lodge is headquartered in downtown Atlanta. Since its inception, Theta Xi has grown to include more than 60,000 initiated members. Currently, there are approximately 45 active chapters and one colony. The Theta Xi Fraternity Chapter House at Rensselaer Polytechnic Institute is listed on the National Register of Historic Places.