WELCOME TO THE THETA CHAPTER OF BYX AT THE UNIVERSITY OF NORTH TEXAS. Beta Upsilon Chi, or Brothers Under Christ, is the largest Christian social fraternity in the United States. It was founded in 1985 at the University of Texas at Austin, and since has moved to 21 different chapters across the nation. Our purpose is to establish brotherhood and unity among college men based on the common bond of Jesus Christ, and our founding verse is Psalm 133:1, "Behold how good and pleasant it is when brothers dwell in unity!"