Final answer:
Zeta Beta Tau, a college fraternity, merged with other houses including Phi Alpha in 1959, Phi Sigma Delta, and Kappa Nu in 1969.
Step-by-step explanation:
The question refers to Zeta Beta Tau (ZBT), which is a college fraternity. ZBT was founded in 1898 as the nation's first Jewish fraternity, though it is now non-sectarian. Over the years, ZBT has merged with several other houses or fraternities. Notably, ZBT merged with Phi Alpha in 1959, Phi Sigma Delta in 1969, and Kappa Nu in 1969. These mergers helped to expand the fraternity's presence on college campuses across the United States.